"Donald Trump said if President Obama releases his birth certificate, he will release his tax returns. The president said, 'Well, I promise not to run for a second term if you release that thing on your head.'" —Conan O'Brien

"Prominent people are coming forward to attest to President Obama's American citizenship. The governor of Hawaii just said he first met Obama just days after he was born. He knew it was Obama because he kept pointing to his diaper and calling for change." —Conan O'Brien

"Trump is very reluctant to release his tax returns. Either he doesn't make as much money as he wants people to think he does, or he doesn't want anyone to know he claims his hairpiece as a dependent." —Jimmy Kimmel

"President Obama released his 2010 tax return. It turns out that he made $1.7 million and spent $14 trillion." —Conan O'Brien

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Check out our political cartoon gallery featuring the week's best cartoons.

New this week: cartoons on Donald Trump's presidential bid, birther nonsense, the debt outlook, and more.

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A roundup of the best late-night jokes about Donald Trump and his presidential ambitions:

1. "Donald Trump is still threatening to run for President. NBC said if Trump runs for President they will not renew 'The Apprentice.' So some good may still come out of all this." —Conan O'Brien

2. "Donald Trump showed his birth certificate to reporters. Who cares about his birth certificate? I want to know if that thing on his head has had its vaccinations." —Craig Ferguson

3. "Stupid presidents, smart presidents, white presidents, black presidents — doesn't work! What this country needs is a crazy Third World dictator. And Donald Trump has what it takes to be that. He's already got a plane with his name on it, solid gold buildings, a harem. ... This is what I've been waiting for my whole life. A President who's not afraid to tell the truth about being a lying a**hole." —Lewis Black

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Mike Keefe of The Denver Post was awarded this year's Pulitzer Prize for editorial cartooning. Keefe, whose work is syndicated by Cagle Cartoons and appears regularly in our weekly cartoon roundup, was cited by the judges for his "widely ranging cartoons that employ a loose, expressive style to send strong, witty messages. "

View Keefe's collection of award-winning cartoons, covering topics such as Arizona's immigration law, gays in the military, the Gulf oil spill, and more.

You can also check out Pulitzer Prize-winning cartoons from previous years.

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• Political Cartoons of the Week
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