BELMONT, Mass. - Moments after casting his vote in his hometown in Massachusetts, Mitt Romney said he isn't sure how he will fare tonight but remained optimistic about his path to the nomination.

"I think it's really hard to predict what's going to happen tonight," said Romney, speaking outside of the Beech Street Center in Belmont. "You know I'm, as I said, I'm hoping for a good win here in Massachusetts, and what happens elsewhere I don't know, but I think we'll pick up a lot of delegates, and this is a process of gathering enough delegates to become the nominee, and I think we're on the track to have that happen."

Asked about recent polls that show his favorability dipping, Romney chalked it up to "the nature of a campaign."

"Obviously you're going to have attacks that come from various people in a campaign process and some of those attacks until they're understood and answered have an impact on people's perceptions. But, you know, these are long campaigns…. We have plenty of time to talk about the real issues," said Romney.

Romney added that he was also "not worried" about the media's seizing on comments they consider gaffes, saying "there will always be in the world of media people who will find clip sentences to try and say something that you didn't mean to say."

"I'm not worried about that. That's just the nature of the process. The American people ultimately get to see the full context. Usually people who try and distort what you say end up getting hurt by their own distortion," he said.

Asked if he had any response to President Obama's good luck wish - Obama responded to a question earlier today at press conference about the GOP candidates by wishing Romney luck - Romney cracked a joke of his own.

"Ahh, do you think that was an endorsement?" he said laughing. "I hope so, but I don't think so. I appreciate the good wishes and uh, and wish him best."

Romney will eat dinner with his son Tagg, who cooked a special dinner of chicken marsala, mashed potatoes and asparagus for Romney and his wife Ann, at their condo in Belmont before heading into Boston, where his election night event will take place.