WATERFORD TOWNSHIP, Mich. - President Donald Trump dangled a promise to get a weary, fearful nation “back to normal” on Friday as he looked to campaign past the political damage of the devastating pandemic. It was a tantalizingly rosy pitch in sharp contrast to Democratic rival Joe Biden, who pledged to level with America about tough days still ahead after Tuesday's election.

In a campaign that has been dominated by the COVID-19 pandemic that has killed more than 227,000 Americans and staggered the economy, the candidates' clashing overtures stood as a reflection of their leadership styles and policy prescriptions for a suffering U.S.A.

Trump and Biden both spent Friday crisscrossing the Midwest, the hardest-hit part of the nation in the latest surge of virus cases. Trump was in Michigan and Biden in Iowa before they both held events in Wisconsin and Minnesota.

With four days until the election and more than 83 million votes already cast, time is running out for Trump and Biden to change the contours of a race framed largely around the incumbent's handling of the pandemic. Biden is leading most national polls and has a narrow advantage in many of the critical battlegrounds that could decide the race.

Trump, billing himself as an optimist, says the nation has “turned the corner” from the outbreak that still kills about 1,000 Americans each day. He speaks hopefully of coming treatments and potential vaccines that have yet to receive approval. Biden dismisses Trump's talk as a siren song that can only prolong the virus, and pledges a nationwide focus on reinstituting measures meant to slow the spread of the disease.

“He said a long dark winter,” Trump scoffed Friday at a rally in Michigan. “Oh that's great, that's wonderful. Just what our country needs is a long dark winter and a leader who talks about it.”

Trump's rallies, which draw thousands of supporters, have served as representations of the sort of “reopening” he has been preaching. With spotty use of masks and a lack of social distancing, they flout state and local guidelines that he deems too onerous as he speaks as though the virus has largely disappeared. Trump and his aides speak openly about catering to the support of those “fed up” by state restrictions, and he has encouraged chants among his supporters calling for the imprisonment of local officials who have instituted them.

Biden, for his part, referenced Trump's comments last summer that the virus “is what it is.” He told supporters in Des Moines, Iowa, that “it is what it is because he is who he is! These guys are something else, man.”

Trump's closing appeal to “Make America Great Again, Again” paints a halcyon image of the nation `s condition during pre-coronavirus times that contrasts with Biden's charge to “Build Back Better.” The president's focus on returning the nation's economy to the boom times of 2019 resonates with some voters, but overlooks the divided and rancorous politics that swirled around impeachment and the persistent problems of inequality.

Friday marked the beginning of the critical final stretch before the election. Trump's closing sprint includes four stops in Pennsylvania on Saturday and nearly a dozen events in the final 48 hours across states he carried in 2016.

Biden, after visiting Iowa, Wisconsin and Minnesota on Friday, will hit Michigan on Saturday, where he'll hold a joint rally with former President Barack Obama.

Biden will close out his campaign Monday in a familiar battleground: Pennsylvania, the state where he was born and the one he's visited more than any other in his campaign. The Biden team announced the candidate, his wife Jill, running mate Sen. Kamala Harris and her husband, Doug Emhoff, plan to “fan out across all four corners of the state.”

After stopping in Green Bay on Friday, Trump will be back in Wisconsin on Monday for a visit to Kenosha. He appears to lag in recent polling behind his 2016 numbers in the GOP-leaning suburbs around Milwaukee, a key area for successful Republican campaigns in the state.

A new Marquette University Law School poll shows Trump with support from 52 per cent of likely voters in the eight counties that form the half-ring around Milwaukee. In 2016, he received a combined 61 per cent of the vote in the eight counties when he won the state by fewer than 25,000 votes.

Attendance at the president's later stop in Rochester, Minnesota, has been capped at 250 people at the insistence of state and local officials.

“We have 25,000 people in Minnesota, which is our last stop today - 25,000 people want to be there. And they say you can only have 250 people,” Trump told reporters on the South Lawn of the White House. “They thought I'd cancel. But I'm not cancelling and we'll find out what happens.”

The Minnesota Department of Health has linked 28 coronavirus cases to other recent Trump campaign events in the state.

Biden aims to hold his election night event in his hometown of Wilmington, Delaware. Trump, who had been scheduled to hold a party at his Washington, D.C., hotel, appeared to be rethinking his plans as a result of the city's COVID-19 restrictions.

“So we have a hotel, I don't know if you're allowed to use it or not, but I know the mayor has shut down Washington D.C.,” Trump said as he headed out from the White House. “And if that's the case, we'll probably stay here or pick another location.”

Miller reported from Washington and Jaffe from Des Moines, Iowa. Associated Press writers Thomas Beaumont is Des Moines and Will Weissert and Brian Slodysko in Washington contributed to this report.