Rep. Francis Rooney Laurence (Francis) Francis RooneyThe Hill's Convention Report: Democrats gear up for Day Two of convention The Hill's Morning Report - Presented by Facebook - Gohmert tests positive; safety fears escalate on Capitol Hill Pelosi to require masks on House floor MORE (R-Fla.) on Friday indicated he has not ruled out the possibility of voting to impeach President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE, an unexpected admission from a GOP lawmaker who is a member of one of the three House committees leading the impeachment inquiry.

"I'm still thinking about it," the Florida Republican said in an interview with The Associated Press when asked if he thought Trump's conduct is impeachable.

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Rooney, who is a member of the House Foreign Affairs Committee, also said acting White House chief of staff Mick Mulvaney Mick MulvaneyOn The Money: House panel pulls Powell into partisan battles | New York considers hiking taxes on the rich | Treasury: Trump's payroll tax deferral won't hurt Social Security Blockchain trade group names Mick Mulvaney to board Mick Mulvaney to start hedge fund MORE's remarks on Thursday amounted to an acknowledgment that there was a quid pro quo at play when the Trump administration withheld U.S. military aid to Ukraine as a means to pressure Kiev to investigate Democrats.

“He said there’s a quid pro quo,” Rooney said of Mulvaney. “I just don’t think that the power and prestige of our country is supposed to be used for political things."

Earlier in the day, The Washington Post reported that Rooney told reporters that Trump “has said many times there wasn’t a quid pro quo ... and now Mick Mulvaney goes up and says, ‘Yeah, it was all part of the whole plan.’”

Mulvaney said during a televised press conference at the White House on Thursday that aid to Ukraine was withheld in part because officials wanted Kiev to investigate an unsubstantiated allegation about Ukraine’s involvement in the hack of the Democratic National Committee (DNC) server in 2016.

When asked if what he described was a quid pro quo, Mulvaney — who has since walked back his comments — said, “We do that all the time with foreign policy.”

Congressional Republicans have largely defended the president by denying there was any quid pro quo.

Rooney told the AP that Mulvaney’s comments signaled a turning point for him giving Trump the “benefit of the doubt” regarding his contacts with Ukraine.

“They were all going around saying what the president said — that there wasn’t a quid pro quo,” Rooney said. “There were a lot of Republicans looking at that headline yesterday. I think people were concerned about it.”

Three committees — Foreign Affairs, Intelligence and Oversight — have been leading the House impeachment inquiry into Trump. Committee members have held several closed-door hearings with current and former administration officials involved in the Ukraine controversy.