Former presidential candidate Herman Cain said on Tuesday he expects Mitt Romney to be the nominee and that he'd get behind the front-runner if he won the nomination.

"The numbers are on Mitt Romney's side, and, yes, I have always said I will support whoever the nominee is," he said on Fox News' "America's Newsroom."

"And it looks like Mitt Romney's going to be the nominee and we do need to get behind him," Cain added.

In January Cain endorsed Newt Gingrich, who has stayed in the race despite financial trouble and frequent losses, after earlier in the month endorsing "the people."

Now, though, Cain said what is important is "the mission" of Republicans taking the White House and the Senate, as well as maintaining control of the House of Representatives.

Cain also defended Romney's ability to appeal to voters after a poll released on Tuesday found he trailed President Barack Obama significantly on likeability and with female voters.

"When they are going head-to-head and Mitt Romney has the opportunity to promote his message and has the opportunity to better inform people, I believe that you're going to see those close," Cain said.