Donald Trump was branded a 'clown' and told to 'shut up' by Joe Biden as the first TV debate of the 2020 election descended into farce.

The President left both Biden and moderator Chris Wallace frustrated after he repeatedly interrupted them during the first segment of the 90 minute showdown.

"Can you see what this clown is doing?", the former Vice President fumed.

"Would you shut up, man? That was a real productive segment. Keep on yapping."

The pair clashed over Trump's plan to rapidly install his nominee to the US Supreme Court to replace the late Justice Ruth Bader Ginsburg.

Biden addressed fears from many voters that the Republicans plan to install conservative judge Amy Coney Barrett in order to tear up the Affordable Care Act, which is relied upon by millions for healthcare.

Even before the debate started, it was clear this was going to be a bare-knuckle fight.

Team Biden declined - also denying, as Trump’s team claimed, that they had asked for “multiple breaks” during the event.

Kate Bedingfield, a Biden deputy campaign manager said Team Trump “seems concerned that he will not do well tonight, and they’re already laying the groundwork for how they’re going to lie about why.” 

She added: “It is completely absurd. Of course he is not wearing an earpiece, and we never asked for breaks.”

The President has repeatedly - without evidence - claimed Mr Biden has relied on "performance enhancing drugs" in previous debates against fellow Democrat Bernie Sanders.

The bizarre line of attack came to a head today, 24 hours before the first Presidential debate of the 2020 US election in Cleveland, Ohio.

The President challenged Biden to a take a drug test ahead of the showdown, saying he would do the same.

I will be strongly demanding a Drug Test of Sleepy Joe Biden prior to, or after, the Debate on Tuesday night. Naturally, I will agree to take one also,” Trump wrote on Twitter.

“His Debate performances have been record setting UNEVEN, to put it mildly. Only drugs could have caused this discrepancy???”

In response, Kate Bedingfield, Biden’s deputy campaign manager treated the President's challenge with every bit of the seriousness it deserved.

“Vice President Biden intends to deliver his debate answers in words. If the president thinks his best case is made in urine he can have at it,” she said.

“We’d expect nothing less from Donald Trump, who pissed away the chance to protect the lives of 200K Americans when he didn't make a plan to stop COVID-19.”