Republican presidential candidates (Lto R) Donald Trump and Sen. Ted Cruz (R-TX) participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Donald Trump, Sen. Ted Cruz (R-TX), and Ohio Gov. John Kasich participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Donald Trump, Sen. Ted Cruz (R-TX), and Ohio Gov. John Kasich participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican Presidential Candidates Marco Rubio (L) and Donald Trump spar during the Republican Presidential Debate in Detroit, Michigan, March 3, 2016.
(Credit: GEOFF ROBINS/AFP/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidate Donald Trump participates in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidate Donald Trump participates in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Donald Trump and Sen. Ted Cruz (R-TX) participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Donald Trump and Sen. Ted Cruz (R-TX) participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Sen. Marco Rubio (R-FL), Donald Trump, Sen. Ted Cruz (R-TX), and Ohio Gov. John Kasich participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Donald Trump and Sen. Ted Cruz (R-TX) participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Sen. Marco Rubio (R-FL), Donald Trump and Sen. Ted Cruz (R-TX) participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
DETROIT, MI - MARCH 03: Republican presidential candidate Ohio Gov. John Kasich participates in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Sen. Marco Rubio (R-FL) and Donald Trump participate in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
Guests watch as Republican presidential candidate Donald Trump participates in a debate sponsored by Fox News at the Fox Theatre on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
GOP Presidential Candidates Debate In Detroit
DETROIT, MI - MARCH 03: Republican presidential candidates (Lto R) Sen. Marco Rubio (R-FL) and Donald Trump participate in a debate sponsored by Fox News on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Chip Somodevilla/Getty Images)
11th Republican Presidential Debate
Spectators gather in the Fox Theatre before the Republican Presidential Debate in Detroit on March 3, 2016. (Credit: GEOFF ROBINS/AFP/Getty Images)
11th Republican Presidential Debate
US Republican Presidential candidates (L-R) Marco Rubio, Donald Trump, Ted Cruz and John Kasich pose for a photo at start of the Republican Presidential Debate in Detroit on March 3, 2016. (Credit: GEOFF ROBINS/AFP/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates (Lto R) Sen. Marco Rubio (R-FL), Donald Trump, Sen. Ted Cruz (R-TX), and Ohio Gov. John Kasich participate in a debate sponsored by Fox News on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls March 8 for the State's primary. (Photo by Scott Olson/Getty Images)
GOP Presidential Candidates Debate In Detroit
Republican presidential candidates Sen. Marco Rubio (R-FL), Donald Trump, Sen. Ted Cruz (R-TX), and Ohio Gov. John Kasich, participate in a debate sponsored by Fox News on March 3, 2016 in Detroit, Michigan. Voters in Michigan will go to the polls on March 8 to vote for their partys presidential nominee. (Photo by Chip Somodevilla/Getty Images)