In the final day of a campaign unlike any other, President Donald Trump charged across the nation Monday, delivering without evidence his incendiary allegation that the election is rigged, while Democratic challenger Joe Biden pushed into states once seen as safely Republican, looking to secure his path to the White House.

America stood at a crossroads. Never before in modern history have voters faced a choice between candidates offering such opposite visions as the nation confronts a once-in-a-century pandemic, the starkest economic contraction since the Great Depression and a citizenry divided on cultural and racial issues.

The two men also broke sharply Monday on the voting process itself while campaigning in the most fiercely contested battleground, Pennsylvania.

The president threatened legal action to stop counting beyond Election Day. If Pennsylvania ballot counting takes several days, as is allowed, Trump charged that “cheating can happen like you have never seen. ”

Biden, in Pittsburgh, pushed a voting rights message to a mostly Black audience, declaring that Trump believes “only wealthy folks should vote” and describing COVID-19 as a “mass casualty event for Black Americans.”

Barack Obama, campaigning for Joe Biden swing state Florida, made the striking point that if a Democratic president acted like Donald Trump, Obama could not support that person.

Wearing a white shirt with rolled up sleeves, the 44th president told an enthusiastic crowd in Miami: “If there was a Democrat who was behaving this way, the way our current president does, I couldn’t support him.”

He went on: “If I saw a Democrat who was lying every single day – the fact checkers can’t keep up, it’s like, just over and over again – I would say that’s not the example I want, I don’t trust that person to manage the country’s affairs because it’s violating the values that we try to live by. And these are values we try to teach our kids.”

Trump has made well in excess of 20,000 false or misleading claims, according to the Washington Post. “The Trump presidency has been a factory of falsehood from the start, churning out distortions, conspiracy theories and brazen lies at an assembly-line pace,” the New York Times observed this weekend.

Obama’s presence in Florida on election eve reflects its status as one of the biggest prizes. Democrats are seeking to boost African American and Latino turnout in Miami to offset Trump’s strongholds elsewhere. But Republicans hope to appeal to Cuban-Americans by painting Biden as a bridge to the socialist left.

Obama added: “Here in south Florida you see these ads, ‘Joe palling with communists, palling with socialists’. You’d think he was having coffee with Castro every morning. Don’t fall for that. Joe Biden served as a senator from Delaware, he was my vice president. I think we’d all know if he was a secret socialist by now.”