WASHINGTON, Sept. 23 – Two prominent U.S. Senate Republicans asked the White House to release information about the phone call between Donald Trump and Ukrainian President Volodymyr Zelenskiy, TPM reported on Monday.

The development comes days after a whistleblower complaint suggested that Trump may have asked Zelenskiy to investigate Joe Biden’s son controversial dealings with a Ukrainian energy group.

That call is already under investigation by House Democrats who are examining whether Trump and his attorney Rudolph Giuliani sought to manipulate the Ukrainian government into helping Trump’s reelection campaign. Lawmakers have demanded a full transcript and a list of participants on the call.

A White House spokesperson declined to comment.

The Democrats’ investigation was launched earlier this month, before revelations that an intelligence official had lodged a complaint with the inspector general.

The Democrats’ investigation was launched earlier this month, before revelations that an intelligence official had lodged a complaint with the inspector general.

The two Republicans raised the issue on Monday and asked the White House to release the information about the call.

Sen. Lindsey Graham (R-SC), who is considered to be one of Trump’s closest allies in Congress, told the New York Times that he hopes the White House can find an “appropriate way” to share the contents of the phone call, stopping short of criticizing any of Trump’s actions.

“I’m hoping the President can share, in an appropriate way, information to deal with the drama around the phone call,” Graham said. “I think it would be good for the country if we could deal with it.”

Sen. Mitt Romney (R-UT) had stronger words of criticism for Trump and the White House, tweeting on Sunday that it was “critical for the facts to come out” and saying if reports about Trump pressuring Ukraine to help with his reelection were true it would be “troubling in the extreme.”

While Republicans remain tight-lipped, the new developments surrounding the whistleblower complaint have pushed more Democrats to elevate calls for impeachment.

House Speaker Nancy Pelosi (D-CA) has avoided publicly embracing the term, but wrote in a letter to colleagues on Sunday that if the White House continues to hide the contents of the complaint it would lead to a “whole new stage of investigation.” (tpm/ez)