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Trump renews call for pre-debate 'drug test'

President TrumpDonald John TrumpNearly 300 former national security officials sign Biden endorsement letter DC correspondent on the death of Michael Reinoehl: 'The folks I know in law enforcement are extremely angry about it' Late night hosts targeted Trump over Biden 97 percent of the time in September: study MORE on Sunday again suggested that he and Democratic presidential nominee Joe BidenJoe BidenNearly 300 former national security officials sign Biden endorsement letter Trump narrows Biden's lead in Pennsylvania: poll Florida breaks first-day early voting record with 350K ballots cast MORE should be tested for drugs before the upcoming debate between the two candidates. 

Trump, who has sought to make Biden's age and mental agility an issue in the campaign by suggesting he has dementia, has baselessly accused Biden of having used drugs to improve his public performance. 

In the latest tweet, which comes just two days before the debate, he again seized on the issue.

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

Trump has put out multiple calls for the candidates to take drug tests ahead of the debate. The first debate will take place Tuesday. 

A spokesperson for the Biden campaign was not immediately available for comment.

In recent days, there has been increased chatter that Trump's repeated claims about Biden could backfire by lowering expectations for his debate performance.