Let's get to the secret tapes from the campaign trail. It's "your voice, your vote." With just 49 days to go, abc's david muir is here. And no apology from mitt romney at that late-night press... See More
Let's get to the secret tapes from the campaign trail. It's "your voice, your vote." With just 49 days to go, abc's david muir is here. And no apology from mitt romney at that late-night press conference. He said say his words were inelegant. Inelegant were the way he described them. He stood by the words last night. The argument he made behind closed doors for a group of wealthy donors, describing voters, nearly half of americans, that in his words, it's not his job to worry about. Overnight in california, walking up to the podium with a forced smile in a hastily-arranged press conference. Good evening, I understand there's a video that's been on the internet for a few weeks that has attracted some attention. Reporter: That video, posted in clips by left-leaning "mother jones" magazine, shows mitt romney in the circle there, speaking to wealthy donors at a fund-raiser, about the 47% of americans he says it's not his job to worry about. There's 47% that are with him. Who believe they are victims. Who believe that government has the responsibility to care for them. Who believe they are entitled to health care, to food, to housing, to you name it. That's an entitlement. And the government should give it to them. And they will vote for this president, no matter what. Reporter: He says they don't pay income tax. And because of that, his message of lowering taxes doesn't resonate. And so, my job is not to worry about those people. I'll never convince them they should take personal responsibility and care for their lives. What I have to do is convince the 5% to 10% in the certain, that are independents. Reporter: Then, a joke. Romney pointing out his father, the one-time governor of michigan, had been born to mexican parents. He was born in mexico. And had he been born of mexican parents, I'd have a better shot at winning this. But he was not. Reporter: Romney shares the strategy of carefully using his wife, ann, on the campaign trail. We use ann sparingly right now, so that people don't get tired of her. Whoever has released the snippets, I'd appreciate if they released the whole tape so we can see all of it. Reporter: Overnight, romney standing by his words. I'm speaking off the cuff in response to a question. And I'm sure I could state it more clearly and in a more effective way than I did in a setting like that. Reporter: We know some of those donors paid $50,000 to get into that fund-raiser in florida last may. In the tapes, romney talks about the kind of words to the donors he uses to pull in independents that might have voted for president obama last time. That the independent voters, in his words, loves to hear the phrase, he's in over his head, when talking about the president. Are they going to like to hear that behind closed doors.
This transcript has been automatically generated and may not be 100% accurate.