Republican Ted Cruz makes a campaign stop at the Bravo Cafe Monday in Osceola, Ind. The Hoosier State might be Cruz's last chance to stop Donald Trump from getting the nomination.
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Candidate for U.S. Senate Katie McGinty, D-Pa., shakes hands with attendees as she arrives for her roundtable discussion with seniors at the Philadelphia Federation of Teachers in Philadelphia last week.
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Republican presidential candidate Donald Trump acknowledges his lookalike Colton Jordan, 5, of Cario, Ga., after a rally at Valdosta State University in Georgia on Monday.
Former first lady Barbara Bush, mother of Republican presidential candidate Jeb Bush, campaigns with her son at a town hall meeting at West Running Brook Middle School in Derry, N.H.
Buddie, the mascot for the pro-marijuana legalization group ResponsibleOhio, waits on a sidewalk to greet passing college students during a promotional tour at Miami University of Ohio last month.
Hillary Clinton participated in 25 primary debates during her 2008 campaign — experience that should serve her well on Tuesday night. But she still has to appear likable and at ease on stage this time.
Harvard Law professor Lawrence Lessig lists Facebook's Sheryl Sandberg and former Daily Show host Jon Stewart as possible running mates among those from whom visitors to his website can choose.