Edition: U.S. / Global

Ohio Working Class May Offer Key to Obama’s Re-election

COLUMBUS, Ohio — As President Obama and Mitt Romney enter the closing week of the presidential race, where the 18 electoral votes of Ohio are seen by both sides as critical to victory, Mr. Obama’s ability to prevent erosion among working-class voters may be his best path to re-election.

Michael F. McElroy for The New York Times

A supporter of President Obama watches one of the presidential debates in Dover, Ohio.

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In Ohio, according to the latest poll of likely voters by Quinnipiac University/New York Times/CBS News, Mr. Obama runs nearly even with Mr. Romney among white voters who do not have college degrees.

That helps explain why he appears slightly better positioned there in the closing week of the campaign than in Florida and Virginia, where the polls found that Mr. Romney holds an advantage of about 30 percentage points among those voters.

The presidential contest has become an intense state-by-state fight, with the climate in Ohio shaped by months of efforts by the Obama campaign to portray Mr. Romney as a job killer who opposed the president’s decision to bail out the auto industry.

Mr. Obama, who has a 50 percent to 45 percent edge here, also appears to be benefiting from an economic recovery in Ohio that is running ahead of the national recovery.

The poll found that nearly half of all white voters without college degrees here say the economy is improving, and most give Mr. Obama some credit. Only about a quarter of those voters in Virginia and Florida say their economy is getting better.

The polls, along with interviews with strategists and supporters in the three battleground states, illustrate the dynamic facing both campaigns in the final days of the race. The race is essentially tied in Florida and Virginia, the polls found.

The presidential race is now brimming with even more uncertainty as Mr. Obama canceled a trip to Ohio on Wednesday and stays off the campaign trail for a third straight day. Mr. Romney was set to resume his schedule in Florida and Virginia, but he faced a delicate task of campaigning during a natural disaster.

But the campaign is still very much alive here in Ohio, where Mr. Romney and Mr. Obama are locked in a bitter duel over blue-collar voters. A dispute over the Obama administration’s 2009 effort to rescue the auto industry boiled over yet again on Tuesday, with the Romney campaign arguing in a new radio commercial that the government’s $80 billion assistance plan helped China more than the United States.

The chief executive of Chrysler, Sergio Marchionne, took the rare step of disputing a presidential candidate by calling the assertion “inaccurate.” He said production would not be moved from the United States to China, adding: “Jeep is one of our truly global brands with uniquely American roots. This will never change.”

The Ohio economy’s recovery has complicated Mr. Romney’s efforts to portray Mr. Obama as an ineffective leader. The president is seen in a favorable light by 52 percent of likely voters, compared with 46 percent who have a favorable opinion of Mr. Romney.

Yet the poll here showed that the race is tight, with Mr. Obama’s five-point edge the same as last week but cut in half from a month ago.

Among the likely voters in Ohio who say they are paying a lot of attention to the race, Mr. Obama’s edge narrows to one percentage point, or essentially tied, which underscores the extent to which the race will turn on the get-out-the-vote efforts of each campaign.

“It seems like the economy is on an upswing,” Kathleen Foley, a special-education teacher in Dayton, said in a follow-up interview. “I truly believe that in the next few years, our economy is going to see an upswing. I’d like Obama to get some credit for the work he’s done.”

In the closing stages of the race, Mr. Romney has taken steps to emphasize the moderate elements of his record. His campaign was running a television advertisement here on Tuesday reminding voters that he supports abortion rights in the case of rape, incest or to protect the life of the mother. Democratic groups and the Obama campaign countered with their own ads.

The economy remains the top issue on the minds of voters, the poll found, and the ads were dismissed as not relevant by one poll respondent, Dana Hogan of Cincinnati.

Jeff Zeleny reported from Columbus, and Dalia Sussman from New York. Reporting was contributed by Allison Kopicki, Marjorie Connelly and Megan Thee-Brenan in New York, and Craig Duff in Cincinnati.