Nearly two months after the Florida primary, Sen. Marco Rubio endorsed Mitt Romney for president.
In an appearance on Sean Hannity's show on Fox, the first-term Florida Republican said Romney had "earned this nomination" and criticized talk of an open convention.
"I think that's a recipe for delivering four more years of Barack Obama," he said.
As a Hispanic lawmaker from a key swing state, Rubio has been discussed as a vice presidential candidate since he won election to the Senate in 2010.
He's carefully managed his career so far, giving a rousing speech to this year's Conservative Political Action Conference, penning an autobiography due to be published soon and taking strong stands on popular conservative causes.
Still, he waited until fairly late in the game to make a stand on the presidential race. He's the 92nd Member of Congress and the 18th Senator to endorse Romney, who has already picked up the support of conservatives such as Sen. Mike Lee (Utah) and Tom Coburn (Okla.).