Winslow Townson, Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks to employees at BAE Systems in Nashua, N.H., Monday, Nov. 21, 2011.

MANCHESTER, N.H. — Former Massachusetts Gov. Mitt Romney is turning President Barack Obama's own words against him in the Republican hopeful's TV first ad of his 2012 White House bid.

Romney said Monday that his first television ad would start airing in New Hampshire when the president visits the state Tuesday. He said the commercial would compare Obama's message as a candidate with Romney's credentials as a businessman.

"The contrast between what he said and what he did is so stark, people will recognize we really do need to have someone new lead this country," Romney said in an interview with Fox News Channel.

Romney's 60-second ad features clips of an Obama campaign stop in New Hampshire four years ago and fresh footage from Romney events from recent days. The ad is slated to run through the Thanksgiving holiday weekend at a cost of $134,000.

Romney, who is at the top of state polls and is sitting on a mound of campaign cash, has kept his focus on Obama over the past year and largely has shied from criticizing his GOP rivals.

"I want people to remember that when he was candidate Obama, that he said he was going to get this economy going, he was going to bring people together, be a real leader for change in America," Romney said.

Obama is set to arrive in New Hampshire on Tuesday to deliver an economic speech. For months, Romney has given interviews to local reporters in states Obama had on his schedule, either pre-empting the president's message or rebutting it.

On Tuesday, Romney planned to use one-time rival Tim Pawlenty and Sen. Kelly Ayotte of New Hampshire to make the case for Romney as a superior choice. Both have backed Romney's presidential bid.

Yet Romney elected to use his first paid television ad not to promote himself or criticize his rivals but to take on the man he hopes to face in November 2012.

"Clearly, the president can't run on his track record," Romney said. "His track record is miserable. ... So what he'll do is try and assassinate, on a character basis, his opponents and/or his opposition. I'm hoping that's me, but I'm not looking forward to those attacks."