"Birtherism" reared its head in the waning hours of the Western Republican Leadership Conference when a participant asked Sen. Mike LeeMichael (Mike) Shumway LeeMcConnell, allies lean into Twitter, media 'war' Conservatives buck Trump over worries of 'socialist' drug pricing Criminal justice reform should extend to student financial aid MORE (R-Utah) and Rep. David SchweikertDavid SchweikertBipartisan resolution aims to protect lawmakers amid heightened threats of violence Conservatives call on Pelosi to cancel August recess The 27 Republicans who voted with Democrats to block Trump from taking military action against Iran MORE (R-Ariz.) why they weren't pushing to impeach Obama for what he said were Obama's falsified citizenship documents.

There is no evidence that Obama has falsified documents or committed any impeachable offenses, but the issue has continued to follow Obama three years after it emerged during the 2008 election.

"We need to win 2012," Schweikert said, telling the questioner that although he could be right, it wasn't worth alienating independents and conservative Democrats who might vote Republican, but who he said are turned off by the focus on Obama's citizenship. "You may be the one where you tell a great story. But understand, you are giving up the 2102 election."

Lee said Congress was the wrong place to turn to enforce citizenship requirements, because state governments run elections. He said he wasn't sure there was any evidence that Obama had falsified documents or committed an impeachable offense.

"I think the birther thing is a loser. We're going to impeach Obama, but we're going to do it in the voting booth," another audience member chimed in, to the applause of Lee and Schweikert.

During the 2008 campaign, Obama released his short-form certificate, certified by his home state of Hawaii. Then in April 2011, he released the long-form version after Donald TrumpDonald John Trump Former US ambassador: 'Denmark is not a big fan of Donald Trump and his politics' Senate Democrats push for arms control language in defense policy bill Detroit county sheriff endorses Booker for president MORE continually accused him of not being an American citizen. But critics have continued to suggest that Obama's documents were forged.

Obama supporters have argued that ruminations about Obama not being an American or eligible to serve as president are grounded in racism, an accusation that birthers reject.