President David Palmer (Dennis Haysbert) from ‘24’
President James Marshall (Harrison Ford) from ‘Air Force One’
President James Dale (Jack Nicolson) from ‘Mars Attacks!’
President Thomas ‘Tug’ Benson (Lloyd Bridges) from ‘Hot Shots Part Deux’
The stand-in in Dave.
John Patrick Ryan?
Was I the only one who actually liked Gina Davis as the “Commander in Chief”?
guess so
This guy totally has my vote. 
He gets my vote.
Lex Luthor!
Primary Colors’s (soon to be) President Jack Stanton (also referenced in the sequel, Running Mates) seemed pretty good.
I’d vote for that guy if only there were a candidate like him in real life.
Also, I find it telling that there are very few conservative fictional presidents portrayed as anything but foppish villians.
Only two come to mind-
Clancyverse’s Jack Ryan (no surprise given the author)
&
My Fellow Americans’s Russell Kramer (hard not to seem likeable and sharp when played by Jack Lemmon, plus he was based on Bush 41, who was acxtually competent even if you disagreed with his policy efforts).
Richard Nixon in Alan Moore’s Watchmen.
Richard Nixon’s head in Futurama. “I’ll sell our children’s organs to zoos for meat, and go into people’s houses at night and wreck up the place!”
Berzelius “Buzz” Windrip in Sinclair Lewis’ It Can’t Happen Here.
Richard Nixon (Dan Hedaya) in Dick. Flips the bird to two teenage girls thru a helicopter window in the last scene.
Phil Chase, from Kim Stanley Robinson’s eco-thriller Sixty Days and Counting!
Or possibly not. But I glanced at the blurb for this book when I was at the bookstore the other day, and it’s too good not to share. Although KSR may be optimistic if he imagines that his writing aids the fight against global warming, or even reflects well on it:
See? Humanity may be facing extinction, but President Chase has a secret weapon to win the war against cataclysmic climate change: a brain-damaged Buddhist man. He’s a maverick in every sense of the word! Presumably that means he’s also a wandering steer who belongs to the first person who brands him.
Michael Douglass in “The American President” was too good to be a president.
Lisa Simpson, of course. “Let’s not say ‘tax increase’, let’s say ‘refund adjustment’”.
And Bart as Secretary of Keeping It Real.
Rightfully named by Entertainment Weekly as the worst episode ever, in my opinion. As far as fictional depictions of presidents in Springfield go, I’m gonna have to go with the title character of Hail to the Chimp!
Best all-time fictional president? David Palmer, of course.
Morbo: “Morbo congratulates our gargantuan cyborg president. May death come quickly to his enemies.”
I was going to say Phil Chase! I’ve just finished the book, which follows on from* Forty Signs of Rain*, Fifty Degrees Below and, to a lesser extent, Antarctica (in which Chase is a minor character as a Senator).
I’m a fan, so I admit I never actually read the blurb, but I admit that it doesn’t make it sound that great! It’s not his best book, but you’d be rooting for Chase, too, if you read the books.
And, while it’s certainly eco, it’s not especially a thriller…
That’s why Kennedy was assassinated. Superman got tired of him and had him killed! Mystery solved!