Rep. Justin Amash Justin AmashRon Paul hospitalized in Texas Internal Democratic poll shows tight race in contest to replace Amash Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (Mich.), an Independent who formally left the Republican Party earlier this year, said Wednesday that a memo of 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's conversation with the leader of Ukraine was a "devastating indictment" of the president.

"Again, it’s not just about a call, but even the call is a devastating indictment of the president," Amash, who previously argued that the controversy surrounding Trump was more so about his "continuing abuse of the office of the presidency," said on Twitter just moments after the White House released a memo of Trump's July 25 phone call with Ukrainian president Volodmyr Zelensky.

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Trump: I would like you to find out what happened with this whole situation with Ukraine, they say Crowdstrike.…



The other thing, 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… — Justin Amash (@justinamash) September 25, 2019

Amash, an outspoken critic of Trump, zeroed in on a portion of the conversation in which the president asked for a "favor" immediately after Zelensky thanked the president for military support.

The lawmaker highlighted sections of the discussion, noting that Trump asked Zelensky to investigate CrowdStrike, a U.S.-based Internet security company that initially examined the breach of the Democratic National Committee’s servers in 2016.

Trump later called on the Ukrainian leader to work with Attorney General William Barr Bill BarrFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Why a backdoor to encrypted data is detrimental to cybersecurity and data integrity FBI official who worked with Mueller raised doubts about Russia investigation MORE to look into allegations of corruption against Biden's son, Hunter Biden.

Trump's phone call with Zelensky is said to be at least part of a whistleblower complaint that has embroiled his administration in controversy over the last week.

Reports first surfaced last week that Trump allegedly pressured the Ukrainian leader to find dirt on a political rival, spawning increasing calls from Democrats to launch impeachment proceedings.

The call occurred around the same time that the Trump administration withheld millions of dollars in military aid to Ukraine, raising additional speculation as to whether the aid was used as leverage in the leaders' talks.

Trump has acknowledged speaking with Zelensky about Biden, but has denied addressing military aid during their conversations.

Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) on Tuesday announced the House would initiate a formal impeachment inquiry into Trump in wake of the developments.

Amash has long been a supporter of impeachment. The congressman publicly endorsed launching impeachment proceedings in May, a decision that prompted a simmering feud with Trump and many Republicans. He formally left the party in July.