For those who thought it is too late for a third-party candidate to run for president, don't count out that option quite yet. Bill Kristol has put out a hypothetical short list of third-party candidates, including Sen. Marco Rubio of Florida and Sen. Tom Cotton of Arkansas, who could run if Donald Trump becomes the Republican nominee, Breitbart News reports. One of the nation's most influential conservatives and editor of The Weekly Standard, Kristol has said that a Trump victory in Indiana this Tuesday would force him to refocus on his so-called Latter-Day Republican independent ticket.