Joe Biden’s campaign showered Donald Trump with mockery on Sunday after the president again demanded that his presidential opponent take a drug test before their first debate on Tuesday.

Trump baselessly suggested, first in a Sunday morning tweet and then later during a press conference, that Biden was taking performance enhancing drugs. Trump has been making similar claims for weeks in an apparent effort to preemptively dismiss a strong Biden showing in the first debate, after spending months attacking the former vice president’s mental acuity.

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