mitt_romney_5.jpgWASHINGTON (AP) _ Republican presidential challenger Mitt Romney is trying to blunt questions about his record as a businessman who has kept part of his vast fortune in overseas accounts. And President Barack Obama is looking for more money for a November election that will be the most expensive, and one of the most contested, in history.

The top issue among voters remains the struggling economy and 8.2 percent unemployment, but Obama has managed through recent attacks on Romney's business record to distract him from that message.

Obama will be in Texas on Tuesday, hoping to raise at least $5 million from gay, Latino and big-dollar donors. Romney will campaign in Pennsylvania, one of the 10 or so states that likely will determine the outcome of the election.

Obama was traveling to a state that has not voted Democratic in a presidential contest since 1976. But Texas ranks among the states with the largest concentrations of wealth, along with New York, California, Florida and Illinois.

The Obama camp also was airing an ad taking issue with Romney's decision to release only two years of his personal tax returns. The ad questions whether Romney has avoided paying his share of taxes in certain years.

Romney has released his 2010 tax return and has said he will release his 2011 return. He has said he will not release other returns, breaking with the custom of past candidates dating to his father, George Romney. He set the standard a generation ago by releasing tax returns for 12 years.

The Obama ad was running for one day only, a sign it was designed to drive media coverage.

The Obama campaign has hammered at Romney's business record, especially discrepancies over when he departed as chief of the private equity firm Bain Capital that he co-founded in the 1980s. Romney says his business record is his chief qualification to be president, and it is the source of his vast fortune, estimated at a quarter of a billion dollars.

Meanwhile, a top Romney aide floated the possibility Monday that the candidate may name his vice presidential selection by week's end, raising the level of intrigue around what may be Romney's most significant decision before Election Day. But the timing was not certain.

Romney senior adviser Eric Fehrnstrom later downplayed the remark, suggesting the decision could come any time between now and the Republican National Convention at the end of August.

The Romney camp is fighting the Obama campaign attacks by contending that the president's Energy Department has steered loans and grants to several companies connected to Obama's political supporters.

“This is a time when it's good to be a friend of the Obama campaign, because you might be able to get some money for your business. But it's not so good to be middle class in America,'' Romney told donors at fundraisers in Mississippi and Louisiana.

Obama campaign spokeswoman Jen Psaki said the Energy Department's decisions “were made without regard to political connections.''

Obama continues to try to undermine public support in Romney's business credentials and trustworthiness. In an interview, Obama defended his targeting of Romney and Bain, saying the public should know if some companies taken over by Bain at any time sent jobs overseas.

“That is hardly a personal attack. That goes to the rationale for his candidacy,'' Obama said in an interview with WEWS-TV in Cleveland that aired Tuesday morning.

Romney has said he left Bain in early 1999, shortly before it invested in companies that were pioneers of job outsourcing. Romney says he played no role in those transactions and decisions.

Two years later, however, Bain was still filing disclosure documents with the Securities and Exchange Commission that named Romney as the firm's CEO, president, sole shareholder and “the controlling person.'' At least one document in early 2001 said Romney's “principal occupation'' was as Bain's managing director.

Bain says it took some time for disclosure forms to catch up with management changes at the firm. Romney says he was working full-time on the 2002 Salt Lake City Winter Olympic Games starting in early 1999.