WASHINGTON -- President Barack Obama exacted his revenge last night after weeks of attacks from his would-be Republican challenger Donald Trump, joking that the billionaire businessman could bring change to the White House, transforming it from a stately mansion into a tacky casino with a whirlpool in the garden.

With Trump in attendance, Obama used the White House Correspondents' Association annual dinner to mock the reality TV star's presidential ambitions. After a week when Obama released his long-form Hawaii birth certificate, he said Trump could now focus on the serious issues, from whether the moon landing actually happened to "where are Biggie and Tupac?" "No one is prouder to put this birth certificate matter to rest than 'the Donald,'" Obama said, referring to Trump's claims the same day that he was responsible for solving the issue.

For Trump's decision to fire actor Busey instead of singer Meat Loaf from his TV show earlier this month, Obama quipped: "These are the types of decisions that would keep me up at night. Well handled, sir."

Obama then showed a screen with his vision of how Trump could bring change to the White House. "Trump" was prominently displayed in glittery letters and girls could be seen with cocktails on a Jacuzzi-augmented front lawn.

Trump chuckled at some of the earlier jokes, but was clearly less amused as comedian Seth Meyers picked up where Obama left off.

"Donald Trump often talks about running as a Republican, which is surprising," said the Saturday Night Live actor. "I just assumed he was running as a joke."

Trump stared icily at Meyers as he continued to criticize the real estate tycoon.

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