He’s called Sleepy Joe for a reason…

Former President Donald Trump on Thursday wished President Biden luck in his upcoming meeting with Russian President Vladimir Putin — and also encouraged him to stay awake.

“Good luck to Biden in dealing with President Putin — don’t fall asleep during the meeting, and please give him my warmest regards!” Trump said in an emailed statement.

Trump nicknamed Biden “Sleepy Joe” during last year’s presidential campaign and repeatedly claimed he was in mental decline…