Republican presidential candidate Donald Trump speaks at a rally Saturday in Pennsylvania. That's the same day a report came out showing Trump may not have paid income taxes for most of two decades. John Locher/AP hide caption
Mitt Romney
Republican presidential nominee Donald Trump speaks at a rally in Green Bay, Wis., on Friday. Darren Hauck/Getty Images hide caption
Hillary Clinton, heartened by her supporters' reception, after voting on the June 7th, the night it became clear she would be the first woman nominee of a major-party ticket. Drew Angerer/Getty Images hide caption
Republican presidential candidate Donald Trump gestures during a rally at the San Jose Convention Center earlier this month. Josh Edelson/AFP/Getty Images hide caption
Mitt Romney, former 2012 Republican presidential nominee, says Donald Trump must make his tax returns public. Bloomberg via Getty Images hide caption
Republican presidential candidate Texas Sen. Ted Cruz waves as he arrives to speak at the 2016 American Israel Public Affairs Committee (AIPAC) Policy Conference on Monday, March 21, 2016, in Washington. (AP Photo/Evan Vucci) Evan Vucci/AP hide caption
Former Republican presidential candidate Mitt Romney speaks during Republican presidential candidate, Ohio Gov. John Kasich campaign stop last week in Ohio. Matt Rourke/AP hide caption
BuzzFeed's K-File (from left: Andrew Kaczynski, Nathan McDermott, Megan Apper and Chris Massie) has been covering the 2016 election by revealing the candidates' contradictions, hypocrises and misstatements. Lauren Zaser/BuzzFeed hide caption
The BuzzFeed Buzz Saw: Why Campaigns Should Fear These Four 20-Somethings
Activist Donna Walker-Brown speaks at an event for black voters sponsored by the Republican Party in Cleveland in January. Nick Castele/WCPN/Ideastream hide caption
Republican presidential candidate, Sen. Ted Cruz, R-Texas, speaks during the Conservative Political Action Conference (CPAC) on Friday. Carolyn Kaster/AP hide caption
Donald Trump gestures Thursday as Sen. Marco Rubio, R-Fla., listens to Trump's response during a Republican presidential primary debate in Detroit. Paul Sancya/AP hide caption
Donald Trump addresses a crowd in South Carolina. Trump has the clearest path to the GOP nomination, but Republicans opposed to him aren't giving up the fight. Spencer Platt/Getty Images hide caption
Former Republican presidential candidate Mitt Romney walks off his campaign plane past Donald Trump's plane in Las Vegas in 2012. Justin Sullivan/Getty Images hide caption
South Carolina Gov. Nikki Haley speaks to the crowd at the Kemp Forum on Saturday in Columbia, S.C. Sean Rayford/AP hide caption