Mitt Romney says he's expecting President Obama to fudge the truth in their three debates, but he probably won't trot out a famous line by Ronald Reagan to counter his rival.

"The challenge that I'll have in the debate is that the president tends to, how shall I say it, to say things that aren't true. And in attacking his opponents," Romney told ABC News. "It's difficult to say, 'Well, am I going to spend my time correcting things that aren't quite accurate? Or am I going to spend my time talking about the things I want to talk about?"

Asked if he'd invoke the "there you go again" retort Reagan deployed in his 1980 debate with Jimmy Carter, Romney told ABC's George Stephanopoulos that he would be "tempted" but probably won't do so.

"I doubt we're going to pull out something from Ronald Reagan," Romney said. "He's one of a kind."

The first of three presidential debates is scheduled for Oct. 3 at the University of Denver. Romney has been preparing for the faceoffs with the help of Sen. Rob Portman, saying the Ohio lawmaker is "very good" in his role as a stand-in for Obama.

In the ABC interview, Romney also played down Obama's likability. Numerous public opinion polls give Obama the advantage on issues of personality, such as in a Washington Post/ABC News survey this week that found Americans would rather have dinner with the president than with Romney.

"The president's a person that a lot of people like," Romney said. "I don't dislike him myself and wish him the very best. But I think the American people are looking for someone who has the capacity to help them get good jobs and more take-home pay. And I do."

Romney's interview aired this morning on ABC's Good Morning America.