Biden: I see no difference between Gingrich and Romney

While Newt Gingrich and Mitt Romney may be engaging a fierce battle for the Republican nomination for president ahead of next week's crucial Florida primary, Vice President Joe Biden on Wednesday sought to portray them as interchangeable.

"This is a Republican fight, but substantively I don't see any fundamental difference between the men," Biden said in an interview on CBS This Morning.

The vice president, on a media blitz after last night's State of the Union from President Obama that is seen by many as a de facto opening speech of his re-election effort, praised the former House speaker for his way with words.

"Newt Gingrich is a talented guy. You know, the guy is really good, he's a great debater," Biden said.

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"But the bottom line here is there is no fundamental difference between Newt Gingrich and Gov. Romney on the things we care about. On the whole issue of how we deal with foreign policy. On how we deal with the domestic policy," Biden said.

Romney and Gingrich face off Tuesday in Florida, where Gingrich has surged in polls in recent days after his come from behind victory in South Carolina's primary Saturday. Mitt Romney won New Hampshire January 10 and the Florida primary is seen as a crucial milepost for both men.

Watch the complete interview in the video player above.