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All eyes will be on the first US Presidential debate between Joe Biden and Donald Trump to see how the two do battle.
It's always one of the biggest events leading up to an election - voters will get a good look at the way the candidates handle pressure and how their policies stand up to criticism.
But it seems like the US President is worried his Democratic opponent is getting a sneaky leg up in the competition.
Trump has accused Biden of taking performance enhancing drugs during the Democratic debates. As a result, he wants both him and Biden to take a drug test before the Presidential showdown just to make sure.
In an interview with the Washington Examiner, Trump says he was shocked to see Biden win the Democratic primary against Bernie Sanders due to what he thought was a lacklustre performance.
"Nobody thought that he was even going to win," the President said, "because his debate performances were so bad.
"We're going to call for a drug test, by the way, because his best performance was against Bernie. It wasn't that he was Winston Churchill because he wasn't, but it was a normal, boring debate.
"You know, nothing amazing happened. And we are going to call for a drug test because there's no way - you can't do that.
"I think it's appropriate. I don't know that they'll let me do it, but I think that they should do it."
Trump says Biden was 'incompetent' during the nearly dozen debates that were held earlier this year to determine who would lead the Democratic party against the Republicans in November.
The President was shocked to see Biden 'all of a sudden be OK against Bernie'.
"I watched him in the debates with all of the different people. He was close to incompetent, if not incompetent, and against Bernie, he was normal," the President said.
"How does that happen?"
Trump also accused his Democratic rival in 2016, Hillary Clinton, of taking drugs before the debate, however no tests were done.
The big debate between Trump and Biden is set for 29 September and will take place at the Case Western Reserve University in Cleveland, Ohio.
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