Democratic presidential candidate former Secretary of State Hillary Clinton and her husband former U.S. president Bill Clinton greet supporters during a caucus day event at Caesers Palace on February 20, 2016 in Las Vegas, Nevada. (Photo by Justin Sullivan/Getty Images)
Nevada Democratic Caucuses
Democratic presidential candidate Sen. Bernie Sanders (D-VT) gives a concession speech at the Henderson Pavilion on February 20, 2016 in Henderson, Nevada. (Photo by Ethan Miller/Getty Images)
Nevada Democratic Caucuses
Democratic presidential candidate former Secretary of State Hillary Clinton greets supporters during a caucus day event at Caesers Palace on February 20, 2016 in Las Vegas, Nevada. (Photo by Justin Sullivan/Getty Images)
Nevada Democratic Caucuses
Democratic presidential candidate Sen. Bernie Sanders (D-VT) gives a concession speech at the Henderson Pavilion on February 20, 2016 in Henderson, Nevada. (Photo by Ethan Miller/Getty Images)
Hillary Clinton Holds Nevada Caucus Day Event
Democratic presidential candidate former Secretary of State Hillary Clinton and her husband former U.S. president Bill Clinton greet supporters during a caucus day event at Caesers Palace on February 20, 2016 in Las Vegas, Nevada. (Photo by Justin Sullivan/Getty Images)
Nevada Democratic Caucuses
Democratic presidential candidate Sen. Bernie Sanders (D-VT) gives a concession speech at the Henderson Pavilion on February 20, 2016 in Henderson, Nevada. (Photo by Ethan Miller/Getty Images)