NEW: Trump agrees to submit to pre-debate drug test—calls on Biden to do the same

Trump wrote on his Truth Social account, "DRUG TEST FOR CROOKED JOE BIDEN??? I WOULD, ALSO, IMMEDIATELY AGREE TO ONE!!!"

The post came after Trump has made the suggestion before. Back in April, Trump told reporter Hugh Hewitt in an interview, "I want to debate, and I think debates, with him, at least, should be drug tested. I want a drug test."

Other have done so as well, such as Rep. Ronny Jackson, who is the former White House doctor for the Bush, Obama, and Trump administrations. Jackson stated in an interview, “I’m gonna be demanding on behalf of many millions of concerned Americans right now that he submit to a drug test before and after this debate, specifically looking for performance-enhancing drugs.”

Biden has had several moments in recent weeks that have seemed to be in line with his older age, in addition to many others that have come before.

During a fundraising event in California, Biden appeared to freeze up on stage when walking off. Obama took him by the hand at that point and brought Biden off the stage. Just weeks before, he appeared to freeze up at a Juneteenth celebration at the White House.

Many have speculated as to whether or not Biden took a stimulant in order to help with the State of the Union address, where he appeared to start in a very energetic manner, but seemed to lose energy as the speech went on.