Ohio Gov. Jon Kasich is the latest to announce his candidacy for the Republican nomination for president, entering the race on Tuesday. See who else is running and who some of the other possible presidential candidates are.
South Carolina Sen. Lindsey Graham announced his presidential bid June 1. Graham, a national security hawk, says he's "more right than wrong on foreign policy" and hopes his track record on foreign affairs will give him the advantage in a wide-open primary fight.