NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump holds up a pledge at a news conference in Manhattan after he signed the pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
GOP presidential candidate Donald Trump speaks at a news conference in Manhattan on Sept. 3, 2015. (credit: Spencer Platt/Getty Images)
<> on September 3, 2015 in New York City.
<> on September 3, 2015 in New York City.
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump holds up a pledge at a news conference in Manhattan after he signed the pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump enters a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump exits a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: Merchandise of GOP presidential front-runner Donald Trump is displayed for sale at Trump Tower in Manhattan on September 3, 2015 in New York City. Trump held a news conference after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
GettyImages-486363120_master
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump holds up a pledge at a news conference in Manhattan after he signed the pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
GettyImages-486363136_master
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump exits a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: People wait for GOP presidential front-runner Donald Trump to speak at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump exits a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump exits a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump exits a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
<> on September 3, 2015 in New York City.
<> on September 3, 2015 in New York City.
<> on September 3, 2015 in New York City.
<> on September 3, 2015 in New York City.
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump holds up a pledge at a news conference in Manhattan after he signed the pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: GOP presidential front-runner Donald Trump's speaks at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: A child holds up a sign in support of GOP presidential front-runner Donald Trump at a news conference in Manhattan after he signed the pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
Donald Trump Holds Media Availability In New York City
NEW YORK, NY - SEPTEMBER 03: People wait for GOP presidential front-runner Donald Trump to speak at a news conference in Manhattan after he signed a pledge Thursday to support the Republican nominee in the 2016 general election, ruling out a third-party or independent run on September 3, 2015 in New York City. Trump made the announcement following a meeting with Republican National Committee chairman Reince Priebus. Trump stressed repeatedly in the news conference that he is leading in all national polls. (Photo by Spencer Platt/Getty Images)
