Mitt Romney Reflects On Iowa Caucus Results 2012 (VIDEO)

WASHINGTON -- Former Massachusetts Gov. Mitt Romney said he recognizes victory in Iowa doesn't guarantee the Republican presidential nomination, saying "I want to make sure this isn't just a one-state sendoff."

Romney told NBC's "Today" show he was "absolutely delighted" with his victory Tuesday since he had been "way behind in the polls."

But he conceded "it's a long road ahead" and that some are uncomfortable with his conservative credentials.

Asked how he could celebrate such a narrow victory, Romney said, "We've got a field of seven viable candidates, so it's just mathematically impossible to do much better than that."

Romney, who won by only a handful of votes, said he understands he's "got a target on my back," but that he has "broad shoulders" and is ready to defend his record.

Romney also appeared on Fox News' "Fox & Friends." He praised Rick Santorum for his strong finish, saying he did a "heroic job going across the entire state, devoting his energy to the state of Iowa." But he added that at the same time, he was building a national organization.

On MSNBC's "Morning Joe," he was asked to compare himself with Santorum. He said that he hasn't had much chance, adding, "I frankly don't know where he is" on several issues.

He aligned himself squarely with conservatives, recalling the 2008 Iowa caucus that he lost. "I do want people to recall that Mike Huckabee and I were the conservative alternatives to John McCain and Rudy Giuliani," he said on Fox. "My positions are pretty darn conservative."

He commented on Sen. John McCain's (R-Ariz.) impending endorsement, which is expected later Wednesday. "I'm pretty pleased that that looks to be the case," he said on Fox. "If in fact he makes an announcement, that would be big for me."