Millions of voters will get their first opportunity to compare the candidates’ policies and personalities side by side on national television for 90 minutes just five weeks before Election Day and as early voting is already unfolding in some states.
Here are some of the biggest questions heading into the night:
In his first formal debate since taking office, Mr Trump has a lot to answer for.
More than 200,000 Americans have been killed by Covid-19 under his watch – the highest death toll of any country in the world. Tens of millions of people are still out of work. The country’s cultural and political divisions are widening. And do not forget the weekend revelations that Mr Trump has paid less federal income tax than most working-class Americans for several years.
Moderator Chris Wallace, of Fox News, and Mr Biden will no doubt press Mr Trump on those facts.
Mr Trump seems to revel in hand-to-hand combat, and history suggests that neither facts nor any code of conduct will prevent him from saying whatever he needs to change the subject. He can pivot to more friendly issues such as the Supreme Court confirmation fight or “law and order” – or he can jump into the mud by going after Mr Biden’s mental and physical strength or his family.
Such personal tactics worked for Mr Trump four years ago. But now that he is the man in charge of the country, it is unclear if voters will be as willing to accept the brash outsider act.
It is difficult to keep up with Mr Trump’s campaign messages, but one line of attack has risen above the rest over the past year: that 77-year-old Mr Biden, or “Sleepy Joe”, is not mentally or physically fit to be president. Therefore, perhaps nothing matters more for Mr Biden on Tuesday night than his ability to convince America that he has the strength to hold the world’s most important job.
Given Mr Trump’s persistent attacks, Mr Biden faces a low bar in proving his stamina.
But it is worth asking whether that is the measure for success that voters should use. After nearly half a century in politics, Mr Biden is a far more experienced debater than Mr Trump, and he has a much better grasp of foreign and domestic policy. On paper, at least, Mr Biden has the advantage.
Yet the former vice president’s uneven performances in the primary debates offer plenty of reasons for Democrats to be worried.
Mr Trump and his Republican allies have been trying to brand Mr Biden as a socialist since he emerged as the Democratic nominee from a pack of primary candidates that featured a self-described democratic socialist (not Mr Biden). And Mr Biden and his allies have been calling Mr Trump a racist since Mr Biden launched his campaign.
On Tuesday, each candidate will have a prime-time opportunity to debate the policies and rhetoric underlying each argument.
Mr Biden, who has long positioned himself to the centre of his party’s most liberal positions, has embraced plans to enlarge the government’s role in healthcare, education and the environment. Such policies are hardly socialist, but they would represent a significant shift to the left and require tax increases.
Mr Trump has a well-established pattern of using racist rhetoric and favouring policies that disproportionately favour white people. For example, Mr Trump has used the power of his office to crack down on Black Lives Matter protesters fighting for civil rights, calling them “terrorists” and warning that violent mobs of such protesters are invading largely white suburbs.
While the candidates’ personalities may draw more attention than their policies, it is their policies that will touch the lives of virtually every American voter.
Heading into the debate, Mr Biden’s team was advising him to avoid messy confrontations and fact checking Mr Trump in real time to avoid getting pulled into the mud with a president who loves getting dirty.
Mr Biden could easily spend all 90 minutes consumed by trying to refute Mr Trump’s claims, and no doubt, liberals will want to see Mr Biden take the fight to the president whenever the opportunity presents itself. But Mr Biden also wants to rise above the chaos and present voters with a clear alternative who is willing to compromise and move past the divisive fights that have dominated the Trump era.
It is a delicate balance, and Mr Biden has struggled at times to stick to his advisers’ plans. You may remember him snapping at voters on the campaign trail back in the spring or the campaign’s futile attempt to get him to shorten and focus his stump speeches.
Even under the best of circumstances, as we have seen in Mr Trump’s previous debates, it is difficult to take on Mr Trump directly. The former reality TV star is clearly comfortable on camera, and he is willing to say whatever he needs to – whether it is true or not.
Mr Trump has repeatedly sought to undermine the integrity of the election by raising unfounded concerns about voter fraud. Trailing in the polls, he has been escalating such warnings as Election Day nears.
Mr Trump’s message is not supported by facts, but many of his supporters believe it. We will see how convincing Mr Trump’s message is, with Mr Biden – and perhaps Mr Wallace – pushing back.
There are legitimate concerns about the Postal Service’s capacity to handle the surge of mail ballots as people try to participate in the election as safely as possible during the pandemic. And several states are scrambling to avoid the same ballot-counting delays that plagued primary elections. But experts are quite clear that there is no evidence of significant voter fraud and very little chance it will happen in 2020.
The experts’ voices are not as loud, however, as whatever will be said on Tuesday night.
