What happened in the debates?
Convention speeches are one thing. But the real test of these two pairs was during the presidential debates, when the American public finally saw the political opponents face each other on the debate stage.
Mr Trump and Mr Biden went at each other hammer and tongs in the first of three debates on September 29, but who won the first election debate?
In a bad-tempered and at times chaotic debate, the candidates ripped chunks out of each other on their records and issues such as the economy and race.
Mr Trump was rebuked several times by Chris Wallace, the moderator, for speaking over his opponent. At one point, after incessant interruptions from the president, Mr Biden said: “Will you shut up, man?”
On the weekend of October 3-4, the Trump campaign announced something of a relaunch of their campaign after the turmoil of the president’s illness, using the banner “Operation MAGA”, which stands for Mr Trump’s campaign slogan – Make America Great Again.
There were two more presidential debates scheduled but when it was announced the October 15 debate would be held virtually because of Mr Trump’s coronavirus diagnosis the president refused to participate.
“I’m not going to do a virtual debate,” Mr Trump told Fox News, calling the decision “ridiculous” moments after the Commission on Presidential Debates announced the changes.
The final presidential debate was held at Belmont University in Nashville, Tennessee, on October 22. Donald Trump delivered a much less combative performance than his first meeting with Biden, as he repeatedly portrayed his rival Joe Biden as an establishment politician unable to bring about real change.
The debates were streamed by all major US networks, including ABC, CBS, NBC, Fox News, CNN and MSNBC.
Read more: Who won the vice-presidential debate?
So how do the candidates match up? We analyse the strengths and weaknesses of each politician.