Jennings would be my guess ... but it won't be the same ... at least for us old farts that grew up with Alex ... but it is still a great show.... funny how many people say how much they learned from watching Jeopardy.

That Trump guy will be lookin' for a job.

Definitely Ken Jennings. I feel like they’ve been grooming him for a bit since the diagnosis. 

SNL skit with Trump as the Jeopardy host could be a hoot:

Answer/clue:  "This candidate flipped three key states to win the 2020 Presidential election."

Contestant reply:  "Who is Joe Biden!"

Trump (a la Trebek):  "Incorrect!  That is a fake answer!  Correct answer should be, "the election was rigged!"

... if anybody needs me I'll be in my basement.