Marco Rubio: “I don’t have a problem with primaries, but I think we’re at a stage now where at least two of the candidates have admitted that the only way to get the nomination is to have a floor fight at the convention”

◼ Rubio endorses Romney, saying he's 'earned' it - FOX

Rubio, a young, first-termer who has been discussed as a possible vice presidential candidate, criticized talk of a fight for the Republican nomination on the convention floor, a possibility that is keeping alive the campaigns of Rick Santorum and Newt Gingrich.

"I think that's a recipe for delivering four more years of Barack Obama," Rubio told Fox News' Sean Hannity.

Romney has "earned this nomination," Rubio said, though he again shot down questions about whether he would accept any offers of a spot on the ticket.

"I don't believe I'm going to be asked to be the vice presidential nominee," he said, adding it's not something he wants.

◼ Rubio endorses Romney - Michelle Malkin