Updated

President Barack Obama, campaigning in Mitt Romney's backyard, criticized his Republican rival anew Monday for what his re-election campaign says is a record of shipping American jobs overseas.

"Gov. Romney's commitment to outsourcing is not just part of his record, it's part of his overall economic vision that he and Republicans in Congress want to implement if they win this election," Obama said.

The Obama campaign has seized on reports that the private equity firm Romney once ran made investments in companies that were described as "pioneers" in outsourcing jobs to China and India. The Romney campaign says the reports do not differentiate between "domestic outsourcing" and "offshoring" and don't take into account work done overseas to support U.S. exports.

During a campaign event in New Hampshire, Obama said that explanation would do little to satisfy workers who have had their jobs moved overseas.

"You don't need someone trying to explain to you the difference between outsourcing and offshoring," he said. "You need someone who's going to wake up every single day and fight for American jobs and investments here in the United States."

The president, with his suit coat off and his shirt-sleeves rolled up, wiped sweat off his face during his 30 minute remarks to a 1,200-person crowd crammed into a hot Oyster River High School gymnasium in Durham, N.H.

Romney campaign spokesman Ryan Williams said Obama was resorting to "false and discredited attacks to divert attention from his abysmal economic record."

Obama's first stops on a two-day, four-state campaign trip were taking him into Romney's backyard. The presumptive Republican nominee has a vacation home in New Hampshire and served as governor of neighboring Massachusetts, where Obama went for an evening of campaign fundraisers in Boston.

As Obama arrived at Boston's Symphony Hall on Monday evening, a sizable crowd of onlookers gathered and a group of Romney supporters held a large blue Romney sign and chanted, "Mitt-Mitt-Mitt." A group of Obama supporters chanted back, "O-Bama" and "Yes, We Can."

Obama told voters in New Hampshire, expected to be a key battleground in the November election, they would have the "final say" over how Washington moves forward in solving the nation's problems. And he warned them not to buy into millions of dollars in ads from Romney and his Republican allies that Obama said would shade the truth about his record.

"Doesn't matter if it's true, they'll just keep repeating it," he said.

In Boston Obama was attending three fundraisers that were expected to bring in at least $3.1 million for his re-election campaign. He also planned to raise money Tuesday in Atlanta and Miami.