And here I thought Donald Trump was a fictional character ;).
President Palmer from 24
“And here I thought Donald Trump was a fictional character”
Donald Drumpf?
Michael Douglass from The American President (…“and I AM the President”)
Kevin Kline, from Dave
@deb922, you should watch John Oliver’s show from last night.
ETA: It seems @doschicos already has watched it 
Harrison Ford from Air Force One: “Get off my plane.”
Okay, now we’re just listing fictional presidents in movies and TV.
OK fine; Mr. Darcy.
Some other contenders:
Barney the purple dinosaur
Jar Jar Binks
Slimer and the giant Marshmellow dude from Ghostbusters
Dr. Claw from Inspector Gadget
Daffy Duck
Elmer Fudd
The entire jockish Alpha-Beta fraternity from Revenge of the Nerds
President Skroob and Dark Helmet from Spaceballs
If Barney the purple dinosaur gets elected, I’m not coming back to the US.
I am going to run across the border and apply for Canadian asylum if either Donald Duck or his maternal incle Scrooge McDuck get elected! 
Good thing you specified what border you are running to, @BunsenBurner because the other border will have a wall and its going to be HHHUUUUGGGGEEEE!
Homer Simpson? That was Mr.'s suggestion.
Considering the antics of a few candidates in one of the televised debates…including those with Ivy credentials, Barney the purple dinosaur is the pinnacle of erudite intellectualism in comparison. 
I can see it now…
Homer Simpson’s campaign poster: FREE DONUTS, NACHOS AND BEER FOR EVERYONE!!
Homer Simpson campaign speech: Nacho nacho man, I wanna be a nacho man…
President Thomas J. Whitmore.
Liam’s Neeson’s character from Taken. Just let him kick the daylights out of Congress!