on the secret tapes causing so much trouble for mitt romney just 48 days before the election. President obama weighed in on letterman last night. Romney doubled down on fox, as polls show obama with a... See More
on the secret tapes causing so much trouble for mitt romney just 48 days before the election. President obama weighed in on letterman last night. Romney doubled down on fox, as polls show obama with a clear lead in key states. Jake tapper is in washington. Reporter: Good morning, george. President obama trying to use those remarks about 47% of americans to paint romney as unable to unite the country. 47% of the american people VOTED FOR john McCain. What I said on election night was, even though you didn't vote for me, I hear your voices. Reporter: On letterman, the president took a jab at mitt romney, over this video leaked to "mother jones" magazine, showing romney say 47% of americans think they're victims and won't vote for him. They should take personal responsibility. My expectation is, if you want to be president, you have to work for everybody. Not just for some. Reporter: And while governor romney defended his remarks on an appearance on fox news. We're, of course, talking about a campaign. And how he's going to get close to half the vote. Reporter: Running mate, paul ryan, says romney would say it differently now. He was obviously inarticulate making this point. And the point we're trying to make is, under the obama economy, government expectancy is up. Reporter: Late tuesday, "mother jones" leaked the full secret video, in which romney suggests his campaign could capitalize on a foreign crisis. I will work to find a way to take advantage of the opportunity. Reporter: Romney tried to pivot, reaching back 14 years to an audiotape of then-state senator obama, how to make governments more efficient by pooling resources. I actually believe in redistribution, at a certain level, to make sure everybody has a shot. I think a society, based upon a government-centered nation, where government plays a larger and larger role, redistributes money, that's the wrong course for america. Reporter: But of course, those comments that romney made, the 47%, are the news. And right now, we have news that the pro-obama super pac, priorities usa action, is running a new tv ad in six battleground states, featuring those comments. And saying that romney does not understand real americans.
This transcript has been automatically generated and may not be 100% accurate.