White House Correspondents Dinner (24 images)

President Barack Obama speaks at the annual White House Correspondents Association Gala at the Washington Hilton hotel, Washington, DC, on April 30, 2011. Obama showed his humor side in discussing his birth certificate and mocking Republican opponents, including Donald Trump. UPI/Martin Simon/Pool

Real estate magnate and billionaire Donald Trump and his wife Melania pose for photographers on the red carpet, arriving for the annual White House Correspondent's Association dinner, April 30, 2011, in Washington,D.C. President Obama will attend the dinner, which combines the administration's top officials, Capitol Hill politicians and Hollywood glitz and glamour. UPI/Mike Theiler

A projected image is shown on a large screen during President Barack Obama's speaeh at the annual White House Correspondents Association Gala at the Washington Hilton hotel, Washington, DC, on April 30, 2011. The president showed his humorous side to show what a "Trump" White House might look like. UPI/Martin Simon/Pool

Actor Jon Hamm (L) reacts to someone he sees as he and his companion Jennifer Westfeldt walk the red carpet as they arrive for the annual White House Correspondent's Association dinner, April 30, 2011, in Washington,D.C. President Obama will attend the dinner, which combines the administration's top officials, Capitol Hill politicians and Hollywood glitz and glamour. UPI/Mike Theiler