The trend of controversial town halls contiuned on Friday when Rep. John Sullivan (R-Okla.) questioned the authenticity of President Barack ObamaBarack Hussein ObamaJudge orders Walker to hold special elections Mueller investigates, Peters quits Fox, White House leaks abound 2020 Dems compete for top campaign operatives MORE's birth certificate and referred to a White House "enemies list" at a meeting in Tulsa.

"This is a scary time in Washington," he said. "It's a very frightening time. I see Barack Obama is creating an enemies list of people who oppose this miserable health care plan. I think that's frightening. That's from a guy that can't even show a long-form birth certificate. I think we all ought to be prepared to fight that."

One audience member at the Tulsa Republican Club didn't think that was enough, berating Sullivan for not doing enough to uncover Obama's citizenship, the Tulsa World reported.

The man was shouted down by other audience members after about one minute.

Several Republicans have accused the White House of forming a health reform "enemies list" after it called for supporters to turn in "fishy" information about the health bill.

The White House has denied such charges, saying that press officials only want to respond to anti-health reform rhetoric.