DANVILLE, Ky. (AP) - In a spirited debate that laid out stark choices, Joe Biden and Paul Ryan teed up pointed arguments on the economy, social policy and America's place in the world that President Barack Obama and GOP rival Mitt Romney now will drive forward into the campaign's final stretch.

With just 25 days to go in Campaign 2012 and throngs of people already voting, Obama and Romney will try to answer two questions that their running mates posed to the tens of millions of Americans who watched Thursday's hard-fought, 90-minute debate. "Who do you trust?" Biden asked. "Wouldn't it be nice to have a job-creator in the White House?" asked Ryan.

Biden, eager to make up for the president's lackluster performance in his first debate with Romney, played the aggressor throughout. And the president gave his running mate a quick thumbs up for delivering with the energy and feeling that he did not.

"His passion for making sure that the economy grows for the middle class came through so I'm really proud of him," Obama said after watching the debate aboard Air Force One on the way home after a day of campaigning in battleground Florida.

Ryan came back at the vice president with harsh talking points, a flurry of statistics and a sharp economic warning: In another Obama term, he said, "Watch out, middle class, the tax bill's coming to you."

Romney, who watched the debate at the end of a campaign day in North Carolina, got on the phone to Ryan immediately afterward to congratulate his running mate.

Now attention shifts to the two remaining debates between Obama and Romney: Tuesday's "town hall" style faceoff in Hempstead, N.Y., and a final showdown, over foreign policy, on Oct. 22 in Boca Raton, Fla.

And the campaigns get right back into the thick of it on Friday, looking for ways large and small to shift more voters their direction in the small number of states whose electoral votes are still up for grabs: Colorado, Florida, Iowa, Ohio, New Hampshire, Nevada, North Carolina, Virginia and Wisconsin.

Look for Romney in Virginia and then linking up with Ryan in Ohio. Biden and wife Jill will woo young voters at the University of Wisconsin-La Crosse. Obama will spend a rare day in Washington, preparing for the next two debates and taking campaign contest winners out to eat.

With so little time left in the countdown to Nov. 6, "every day, every hour counts," said Rahm Emanuel, the Chicago mayor who served as Obama's first White House chief of staff. "Everything counts."

The president has set aside a serious chunk of time for preparation after being faulted for underestimating the importance of his first debate with Romney. He'll be hunkered down in Williamsburg, Va., from Saturday until Tuesday rehearsing, with Sen. John Kerry, D-Mass, acting as a proxy for Romney.

Romney's return to Ohio this weekend signals the importance of a state seen by both sides as the decisive to the whole election. Obama holds the edge there.

Obama had to hope that Biden's solid showing on Thursday was enough to shift a campaign dynamic that has had the momentum moving Romney's way since the first debate.

Romney, for his part, had to hope that Ryan's performance would keep up the good karma for the GOP.

The running mates clearly sensed that the stakes were higher than usual for their faceoff, and both played hardball throughout, frequently interrupting one another and challenging one another's assertions.

On television's split screens, Biden's body language - a montage of pained smiles, winces, head shakes and eye rolls - often screamed incredulity when Ryan was speaking.

"I know you're under a lot of duress to make up for lost ground," Ryan shot back at Biden at one point, "but I think people would be better served if we don't keep interrupting each other."

In one of the night's lighter moments, Ryan helpfully provided a translation of one of Biden's putdowns. "This is a bunch of stuff," Biden said of Ryan's dismissive characterization of the president's Iran policy. "What does that mean, a bunch of stuff?" asked moderater Martha Raddatz of ABC News. "It's Irish," Ryan offered. "It is," Biden agreed, to laughter from the audience. "We Irish call it malarkey."

At another point, Ryan used Biden's own history of gaffes to explain away Romney's much-criticized comment dismissing the 47 percent of Americans who pay no taxes, a comment that Biden brought up repeatedly after Obama had failed to mention it in his debate.

"I think the vice president very well knows that sometimes the words don't come out of your mouth the right way," Ryan said.

There were spirited exchanges on taxes, abortion, Medicare, Libya, and more. It may not have broken new ground, but the conversation gave viewers a clear illustration of the sharp choices before them come Election Day.

"In case you haven't noticed, we have strong disagreements," Biden said in his closing statement. And then he distilled the Democrats' campaign pitch into a simple bid to give anxious Americans "a little bit of peace of mind."

Ryan then spoke of the "big choice" in this election, and argued that Obama had had his chance and failed.

"This is not what a real recovery looks like," he said. "You deserve better."

For all of the political back-and-forth that's transpired over the past two months, the race essentially stands where it was in August, before the two national political conventions, with the two candidates running about even in national polls.

There's been no shortage of drama in between: the revelation of Romney's caught-on-tape comment about the 47 percent, Biden's remark that the middle class has been "buried" in the past four years, Obama's weak showing in the first debate, the ongoing tussle over the administration's handling of the attack that left four Americans dead in Benghazi, Libya, and more.

With turnout critical, both campaigns are devoting considerable energy to ensuring that supporters are registered to vote and taking advantage of the early voting options that are available in many states. Nearly a million Americans have already voted.

The Democrats' month-long "gotta vote" bus tour will be in Milwaukee on Friday, just in time to rev up supporters for the opening of Wisconsin's early voting season on Monday.

And both sides are keeping up the push for campaign contributions to keep the battleground-state airwaves full of political ads.

Within a few hours of the debate, Romney, Obama and Biden all were out with emails to their supporters, asking for more cash.

___NANCY BENAC Associated Press Benac reported from Washington. ___

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