Graham: 'I don't know' if quid pro quo is impeachable offense

Senate Judiciary Committee Chairman Lindsey GrahamLindsey Olin GrahamInspector general testifies on FBI failures: Five takeaways Horowitz offers troubling picture of FBI's Trump campaign probe Conservatives rip FBI over IG report: 'scathing indictment' MORE (R-S.C.) on Tuesday said it was unclear to him whether it would be an impeachable offense if President TrumpDonald John TrumpThe Hill's Morning Report - Sponsored by AdvaMed - House panel expected to approve impeachment articles Thursday Democrats worried by Jeremy Corbyn's UK rise amid anti-Semitism Warren, Buttigieg duke it out in sprint to 2020 MORE demanded a quid pro quo from Ukraine's president.

“I don’t know,” Graham said, adding that the answer depends on the details.

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“We put conditions on aid all the time," he told reporters Tuesday afternoon. "But if you said I’m not going to give you money unless you investigate my political opponent to help me politically, that would be completely out of bounds.”

Graham, who has consistently defended Trump amid the Democrats' impeachment inquiry, said it would be OK if Trump withheld military assistance to Ukraine to push for a policy concession beneficial to U.S. interests.

Trump mentioned former Vice President Joe BidenJoe BidenThe Hill's Morning Report - Sponsored by AdvaMed - House panel expected to approve impeachment articles Thursday Democrats seek leverage for trial Democrats spend big to put Senate in play MORE in his phone conversation with Ukrainian President Volodymyr Zelensky, according to a rough White House transcript, though it’s unclear whether he explicitly linked U.S. military aid to an investigation of the Democratic presidential candidate or his son Hunter Biden.

“There's a lot of talk about Biden's son, that Biden stopped the prosecution and a lot of people want to find out about that so whatever you can do with the attorney general would be great. Biden went around bragging that he stopped the prosecution,” Trump told Zelensky, according to the transcript.

Other Senate Republicans shared Graham's view that the motivation behind the quid pro quo should be the determining factor.

“If the hypothetical is you’re going to get $1.8 billion in U.S. aid if and only if you spend $50 million promoting my candidacy, that would be a problem,” said a GOP senator, adding that the important question is whether Trump was pursuing U.S. interests or something that would benefit him personally.

The majority of Senate Republicans at this point say they do not believe the contents of the July 25 call show that Trump withheld military aid to Kiev to force Ukrainian officials to conduct a damaging investigation of Biden, a front-runner for the 2020 Democratic presidential nomination.

Graham's remarks came just hours after Democrats released a transcript showing a top diplomat appointed by Trump had revised his testimony to lawmakers in the impeachment inquiry to say the president’s dealings with Ukraine amounted to a clear quid pro quo.

U.S. Ambassador to the European Union Gordon Sondland said Trump withheld U.S. military aid to Ukraine in an effort to secure investigations into the 2016 election and the president’s political adversaries, according to a transcript released by Democrats on the three House committees leading the impeachment probe.