Continued from page 1

The complaints about polls are a reversal from three weeks ago, when Republicans were complaining that surveys were skewed toward Mr. Obama. GOP pollsters said some polls were sampling a higher percentage of Democrats than they should have been.

Ms. Psaki said the polls are helping determine Mr. Obama’s campaign schedule. After this week’s debate, Mr. Obama will campaign in Iowa, Ohio, New Hampshire and Virginia.

But the polls have turned in nearly every swing state. In Ohio, Mr. Obama’s pre-debate lead of as much as 8 percentage points is down to about 2 points in the Real Clear Politics average of polls. That same slippage has happened elsewhere across the industrial Midwest, including in Michigan, where a 10-point lead for Mr. Obama on Oct. 2 has slipped to 4 points, according to the RCP average.

As the campaign heads into the final three weeks, Mr. Obama sent a fundraising email to supporters Monday declaring, “This race is tied.”

“What we do over the next 22 days will determine not just the next four years, but what this country looks like for decades to come,” Mr. Obama said in his pitch for more donations.

One ominous development since the first debate has been a shift in Florida polls among Hispanic voters away from Mr. Obama. A Tampa Bay Times/Bay News 9 survey released Thursday had Mr. Romney and Mr. Obama in a virtual tie among that state’s Hispanics, prompting a senior Obama adviser to comment on the same day, “That’s an impossibility.”

But a Florida International University/Miami Herald/El Nuevo Herald poll released Monday also showed a tightening of the race among Hispanic voters in the Sunshine State, with Mr. Obama leading Mr. Romney 51 percent to 44 percent, just half the 15-point margin by which Mr. Obama won Florida Hispanics in 2008.

Nationally, the same survey showed Mr. Obama leading Mr. Romney 66 percent to 31 percent among Hispanics. Pollsters said the difference in Florida is the Cuban-American community, which is largely Republican and could be more enthused about Mr. Romney’s performance in the first debate.

A Politico/George Washington University poll released Monday puts Mr. Romney in the lead, 50 percent to 48 percent, in the most competitive states: Colorado, Florida, Iowa, Michigan, Nevada, New Hampshire, North Carolina, Ohio, Virginia and Wisconsin.

But the president’s top aides say he has leads in Nevada, Iowa, New Hampshire, Ohio and other battleground states that Mr. Romney will be hard-pressed to overcome.

The candidates will debate for a third and final time on Oct. 22 in Boca Raton, Fla.