DENVER - Buoyed by a powerful debate showing, Mitt Romney said Thursday he offers "prosperity that comes through freedom" to a country struggling to shed a weak economy.
President Barack Obama accused the former Massachusetts governor of running from his own record in pursuit of political power.
Both men released new ads in the battleground states in a race with little more than a month to run, Obama claiming Romney couldn't be trusted with the presidency, and the Republican suggesting the president is backing a large tax increase on the middle class.
Republican presidential candidate Mitt Romney campaigns with running mate Paul Ryan in Fishersville, Va., Thursday.
The debate reached 67.2 million viewers, an increase of 28 percent over the first debate in the 2008 presidential campaign. The measurement and information company Nielsen said Thursday that 11 networks provided live coverage of the debate.
Not even Democrats disputed that Romney was likely to benefit politically from the debate Wednesday night in which he ably challenged Obama's stewardship of the economy and said his own plans would help pull the country out of a slow-growth rut. Still, there was no immediate indication that the race would expand beyond the nine battleground states where the rivals and their running mates spend nearly all of their campaign time and advertising dollars.
Debate host Colorado is one of them, and Virginia, where Romney headed for an evening speech, is another. So, too, Wisconsin, Obama's destination for a rally. Nevada, Ohio, Iowa, New Hampshire, Florida and North Carolina are the others.
Among them, the nine states account for 110 electoral votes out of the 270 needed to win the White House, more than enough to tip the campaign to one man or the other.
"Victory is in sight," Romney exulted in an e-mail to supporters.
Reprising a line from the debate, he told an audience in Denver that Obama offers "trickle-down government."
He added, "I don't think that's what America believes in. I see instead a prosperity that comes through freedom."
Another possible pivot point in the campaign neared in the form of today's government report on unemployment for September. Joblessness was measured at 8.1 percent the previous month.
No president since World War II has won re-election with the unemployment rate higher than 7.2 percent.
Obama campaigned with the energy of a man determined to make up for a subpar debate showing. Speaking to a crowd not far from the debate hall, he said mockingly that a "very spirited fellow" who stood next to him onstage Wednesday night "does not want to be held accountable for the real Mitt Romney's positions" on taxes, education and other issues. "Gov. Romney may dance around his positions, but if you want to be president, you owe the American people the truth," he said.
Later, before a gathering in Madison, Wis., he said Romney wants to cut federal funding for Public Television while repealing legislation that regulates the banking industry "I just want to make sure I've got this straight: He'll get rid of regulations on Wall Street, but he's going to crack down on 'Sesame Street,'" Obama said.
Taxes were a particular point of contention between the two men, although they were sharply divided as well on steps the cut the deficit, on government regulation, on education and Medicare.
Both in the debate and on the day after, Obama said repeatedly that his rival favors a $5 trillion tax cut that is tilted to the wealthy and would mean tax increases on the middle class or else result in a spike in federal deficits.
Romney said it wasn't so, and countered in a new ad. It cited a report by the American Enterprise Institute that said Obama and his liberal allies want to raise taxes on middle class earners by $4,000 and that the Republican alternative would not raise the amount they owe to the IRS.
His ad was a parry against a report by the Tax Policy Center that Obama has frequently tried used to political advantage, as he did again during the day.
In a new ad by the president's campaign, Romney is quoted as saying that a $5 trillion tax cut "is not my plan." The ad then cites a study by the Tax Policy Center as saying it is, and asks why the Republican challenger "won't level with us about his tax plan which gives the wealthy huge new tax breaks.
"Because if we can't trust him here" - a photo of the debate stage appears - "How could we ever trust him here," the narrator says as a photo of the Oval Office fills the screen.
The two men debate twice more this month, Oct. 16 in Hempstead, N.Y. and Oct. 22 in Boca Raton, Fla.
Before they do, Vice President Joe Biden and Romney's running mate, Wisconsin Rep. Paul Ryan, will share a stage in Danville, Ky. in one week's time.
Biden plunged into the tax debate during the day, saying the administration does indeed want to increase the taxes paid by the wealthy by $1 trillion.
"We want to let that trillion-dollar tax cut expire so the middle class doesn't have to bear the burden of all that money going to the super wealthy," he said while campaigning in Iowa. "That's not a tax raise, that's called fairness where I come from."
Republicans didn't see it that way, and said the comment as evidence the administration's policies would kill jobs.
Biden is still recovering from a recent comment acknowledging that the middle class has been "buried" in the last four years.
Whatever the eventual outcome of the race, Romney seemed to have achieved his goal of a campaign reset. Democrats braced for tight polls over the next several days in the states where the campaign will be won or lost.