Obama himself has said that the comedian’s impression, which recurs on the venerable NBC program, is improving.

In Oliver Stone's 2008 feature film, the actor subsumed himself in depicting more than four decades in the life of the nation's 43rd president.

The New Hampshire governor-turned-Democratic president led the country and a walking-and-talking cadre of aides, advisors and staff with benevolence.

Now here's a president who’s not afraid to make tough calls, whether on abortion, medicinal chamalla, or airlocking Cylons.

May he rest in peace — he deserves it. What other president has had to deal with a lying First Lady, scheming underlings, viral and nuclear threats, and finally, after he left office, assassination? Not even Lincoln had it this bad.

What other president could remain so calm and reassuring, even as he takes to the airwaves to deliver this piece of not-good news: "The comets are still headed for earth."

Arnold's cameo in the Simpsons big-screen debut returned him to his roots as an actor, where he usually played a man of few words who liked to blow things up. Let's hope in this case, life doesn't imitate art.

The first president got second billing to Paul Giamatti's Adams, but other leaders could take a lesson in humility from his almost-whispered oath of office.

America's first female president had a strong constituency with critics, but after a promising freshman season, it lost the support of viewers — and couldn’t win a second term.

Ah, President/widower Shepherd brought vulnerability to the Oval Office, dodging the press and paparazzi in the pursuit of love. He also occasionally made speeches, and, in true Michael Douglas fashion, ignored the commas in every one.

"The only thing we have to fear is fear itself." "Tear down this wall." "Get off my plane." President Marshall delivered one of the all-time best presidential-tough-guy quotes as he ridded Air Force One of terrorist hijackers.

The classic hands-off chief executive just wants to get through another day without barking aliens destroying any more national monuments for sport.

So, he waited a little too long to evacuate cities before the alien attacks, but you have to give this guy credit for his rallying speech to the troops and his ability to suit up and fly into battle himself.

Why can't there be more presidents like this guy? He's a regular guy who rides his bike everywhere and tries to help people in his town get jobs. He even moonlights as a presidential impersonator... until the real guy drops dead.