What is going on with Joe Biden? Drug test needed?

What is going on with Joe Biden?
Drugs?

Former President Trump said he wants President Biden to be drug-tested before their first debate.
“I’m gonna demand a drug test too, by the way,” Trump said at the Minnesota Republican Party’s Lincoln Reagan Dinner Friday. “I am, no I really am. I don’t want him coming in like the State of the Union, he was high as a kite.”

https://thehill.com/homenews/campaign/4672061-donald-trump-demands-drug-test-for-joe-biden-ahead-debate/mlite/?nxs-test=mlite