Changing my vote. I wish I’d thought of this first.
Steve Buscemi. 'Cause the political cartoonists would have a frickin FIELD DAY with him.
Plus he’s the awesomeness.
There is only one possible answer: Chuck Norris.
Because he’s Chuck Norris.
Tom Clancy.
Because I want to see most of the world burn…and look awesome as it goes.
Bruce Springsteen,
to fulfill the prophecy of Bloom County.
my google fu is too weak to find a strip online.
Morgan Freeman…cause hes Morgan MUTHA FUCKIN FREEMAN BITCH!!!
or George Clinton because hes a mix of Bush senior and Bill Clinton but funky
Grace Park, because shes hot as hell and I would love to see all the Exploding heads with a young asian woman as the CiC.
Ben Stein, with Larry Miller as his wisecracking side-kick (aka his VP)
Or do we need a Gentile to balance out the ticket?
Does Jon Stewart count as an actor? Because if so, him.
My pick: Rachel Maddow
Unfortunately Norris is a crazy-ass Birther Teabagger loonball asshole. He makes Limbaugh, Beck, Savage, Coulter, Bachman and Palin look like flower-power Leftys.
Unfortunately, can’t be fictional as per the OP.
Assuming we can perform subtle surgery to change some of his publicly stated opinions, well…ok…most of his publicly stated opinions…then I nominate Cowboy Bill Watts for President, and The American Dream Dusty Rhodes for Vice President. Watts ain’t gonna bow to anybody, and he just might punch out a world leader. He could resolve most world conflicts inside a steel cage on PPV, which would generate funds to pay down the deficit and reduce military spending. Watts vs Kim Jong II (managed by Skandar Akbar) would put asses in the seats. 
Ted Nugent.
Samuel Jackson.
Either one would give entertaining State Of The Union speeches.
Which Chuck Norris?
Real Chuck Norris is rather a dweeb.
Internet meme Chuck Norris is not president because he doesn’t wish to be, and no one dares suggest he do anything he doesn’t wish to do.
David Letterman, because:
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He seems like he’s fairly no-bullshit
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He comes across as quite intelligent, but not icily, forbiddingly so
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He’s not afraid to get his dick wet
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He’s of my general political persuasion
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And he’s goddamn funny. So, if nothing else, there’s that
Seconded. I immediately thought of him when I saw this thread. It could definitely happen.
Don’t be silly, get the real Karate Kid, Ralph Macchio. He’s the right age and I hear he’s a really nice guy. Or he was.
Jon Stewart, because his insightful wit and profound understanding of government is exactly what we need
Carl Weathers; that man knows how to get a stew on, and can balance the budget but making congresspeople go to Burger King and taking advantage of the free refills.
But if we’re looking at the role strictly in terms of no bullshit awesomeness, I’m going to have to throw in with Jon Stewart.
Stranger
Henry Rollins. I think I’d trust Henry Rollins.
Hmm…several come to mind:
Oprah - she could just write a check and everybody would get their mortgages, credit cards, student loans, car loans, back rent, etc. paid off. Plus we get Gail for free.
Bill Maher - very astute, and just to see Fox News reporters heads’ implode upon hearing the news would make it worthwhile.
Betty White - hell, she’s done everything else, why not President? Start a Facebook page and get her elected.
Anthony Bourdain - has traveled around the world, knows how to party and doesn’t take shit from anyone. Plus, he seems like he would tell the truth because, quite simply, he doesn’t give a fuck what anybody thinks.
Kiefer Sutherland - the world knows that Jack Bauer cannot be beaten. End of all wars in 24 hours - just having him whisper in a dictator’s ear would have them beg for mercy. Chloe as VP of course.
Homer Simpson - yes, even an animated character - why not? He could show up in multiple countries at the same time, people like him around the world and - well, he wouldn’t be the first president on earth who was a puppet of sorts with a consortium of staff mouthing his words in the background.