Reggie Brown, impersonating US President Barack Obama, speaks during the 2011 Republican Leadership Conference in New Orleans, Louisiana, June 18, 2011. [Photo/Agencies]

NEW ORLEANS - An actor impersonating President Barack Obama was ushered off the stage after he mocked the Republican presidential hopefuls and joked about the real president's biracial roots to a room full of conservative activists Saturday.

The Republican Leadership Conference turned the podium over to impersonator Reggie Brown, who drew raucous applause from the audience when he projected lewd photos of disgraced and resigned Democratic Rep. Anthony Weiner on Saturday. Brown returned to Weiner when describing former House Speaker Newt Gingrich's campaign: "His supporters are dropping faster than Anthony Weiner's pants."

Brown opened his routine with jokes about Obama's biography as the son of a mother from Kansas and a father from Kenya.

The room grew more uncomfortable as Brown turned to the Republican candidates who are looking to make Obama a one-term president.

Brown took a shot at former Minnesota Gov. Tim Pawlenty, who missed the conference because "he's having his foot surgically removed from his mouth."

"Don't worry: it's covered under Obamneycare. Along with spinal transplants," Brown said.

Pawlenty has struggled this week after previewing his criticism of Romney's health care overhaul in Massachusetts that was a model for Obama's national plan. Pawlenty first called it "Obamneycare," a hybrid of Romneycare and Obamacare. But when given the shot to use the term while sharing the stage Monday night with Romney in a candidates' debate, he balked.

Pawlenty later said it was a mistake not to offer a stronger criticism.

The impersonator also made a joke about Romney's Mormon faith and polygamy, and Rep. Michele Bachmann's tea party support.

Organizers then cut off Brown's microphone and turned on music.