House Republican Conference Chairwoman Liz Cheney Elizabeth (Liz) Lynn CheneyGOP lawmakers distance themselves from Trump comments on transfer of power Graham vows GOP will accept election results after Trump comments Liz Cheney promises peaceful transfer of power: 'Fundamental to the survival of our Republic' MORE (Wyo.) condemned attacks on Lt. Col. Alexander Vindman Alexander VindmanImpeachment witness Alexander Vindman calls Trump Putin's 'useful idiot' The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Strzok: Trump behaving like an authoritarian MORE, a witness called to testify as part of the impeachment inquiry, blasting those who have questioned his patriotism on Tuesday.

Cheney, the No. 3 Republican in the lower chamber, did not spell out who she was criticizing for attacks on Vindman, but her remarks followed a critical tweet by 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.

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Cheney began by criticizing House Democrats for their handling of impeachment before moving to a defense of Vindman.

“It really is shameful what the Democrats have been doing in terms of attempting to try to impeach a sitting president in the basement of the Capitol," Cheney said at a press conference. "Now, I also want to say a word about something else that's been going on over the course of the last several hours and last night, which I think is also shameful.

“And that is questioning the patriotism, questioning the dedication to country of people like Mr. Vindman, Lt. Col. Vindman who will be coming today, and others who have testified. I think that we need to show that we are better than that as a nation.”

Cheney went on to say while the parties may be at odds over impeachment, Republicans should not be “dragged down to the level” of Democrats.

“Their patriotism, their love of country — we're talking about decorated veterans who have served this nation, who put their lives on the line, and it is shameful to question their patriotism, their loving this nation, and we should not be involved in that process,” she continued.

“We need to make sure that we are abiding by upholding the Constitution. Just because the Democrats refuse to do that does not mean that we have to let ourselves be dragged down to the level at which they're operating, and we won't do that as Republicans.”

Her comments come after the president and numerous GOP pundits and Trump allies took to social media and cable news programs to blast Vindman, a Purple Heart recipient, as a partisan Never Trumper looking to smear the president.

“Supposedly, according to the Corrupt Media, the Ukraine call ‘concerned’ today’s Never Trumper witness. Was he on the same call that I was? Can’t be possible! Please ask him to read the Transcript of the call. Witch Hunt!” Trump tweeted on Tuesday morning.

News of Vindman’s statement to the congressional panels began circulating on Monday night, before Trump's tweet. In his opening statement, Vindman expressed concerns over a July 25 call between Trump and Ukraine's president where Trump pressed for an investigation of former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE.

Vindman saw the pressure as threatening bipartisan support for Ukraine in the United States.

“I did not think it was proper to demand that a foreign government investigate a U.S. citizen, and I was worried about the implications for the U.S. government’s support of Ukraine,” he said in his statement. “I realized that if Ukraine pursued an investigation into the Bidens and Burisma it would likely be interpreted as a partisan play which would undoubtedly result in Ukraine losing the bipartisan support it has thus far maintained.”