Trump renews call for pre-debate 'drug test'

President TrumpDonald TrumpRonny Jackson, former White House doctor, predicts Biden will resign McCarthy: Pelosi appointing members of Jan. 6 panel who share 'pre-conceived narrative' Kinzinger denounces 'lies and conspiracy theories' while accepting spot on Jan. 6 panel MORE on Sunday again suggested that he and Democratic presidential nominee Joe BidenJoe BidenHouse Republican calls second bout of COVID-19 'far more challenging' Conflicting school mask guidance sparks confusion Biden: Pathway to citizenship in reconciliation package 'remains to be seen' 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.