A former Reagan administration official railed against Republicans over the weekend for continuing to back President TrumpDonald John TrumpMost Americans break with Trump on Ukraine, but just 45 percent think he should be removed: poll Judge orders Democrats to give notice if they request Trump's NY tax returns Trump's doctor issues letter addressing 'speculation' about visit to Walter Reed MORE as House Democrats pursue an impeachment inquiry.

During a segment on CNN’s "State of the Union," Linda Chavez, who previously served as the White House director of public liaison, said Republicans were “absolutely abrogating their duty” as tensions escalate over the impeachment inquiry.

"It's like the invasion of the body snatchers," Chavez said. "I don't know who these people are. I mean, they have so changed their tune. This is really serious," she said.

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Chavez, who noted during the segment that she had previously identified as a Democrat before serving under former President Reagan, said she used to believe that “the Republican Party was devoted to the truth, that we believed in ideals."

"We were devoted to the Constitution," Chavez said. "And what I see happening now is people who are absolutely abrogating their duty.” 

“They are putting politics first and they're scared. They're scared of Donald Trump,” she continued.

Her remarks echo similar sentiments from former CIA chief John BrennanJohn Owen BrennanTrump bemoans 'double standard' in Stone conviction The curious timeline for taking down Trump Brennan: Russian election interference 'changed the mind of at least one voter' MORE, who said during a segment on NBC's “Meet the Press” on Sunday that Republican senators are "running scared" of Trump as talk of impeachment continues.

Brennan also called out Sen. Ron JohnsonRonald (Ron) Harold JohnsonGOP senator calls impeachment 'sabotage' effort, raises questions about witness on eve of testimony GOP invites Republican senator to provide information in impeachment inquiry Impeachment hearings don't move needle with Senate GOP MORE (R-Wis.) over his earlier appearance on the same program. Johnson and host Chuck ToddCharles (Chuck) David ToddJohnson: I'm writing a letter to 'lay out what I know' about Ukraine aid Patrick says he won't stop super PAC funding for his campaign Chuck Todd on impeachment hearing: Part of GOP 'just not accepting facts that are facts' MORE got into a heated back-and-forth during which Todd accused the senator of not answering his questions to "make Donald Trump feel better here that you're not criticizing him."

"Clearly Sen. Johnson is running scared of Donald Trump, as are the other Republican senators, because if they say anything against him, he comes after them with a vengeance," Brennan said later. 

Brennan also said that Trump transformed into a "typical bully," adding that "it's clear that the Republicans in the Senate are just going along." 

"I've had many issues with the Democrats over the years," Brennan also said. "But I have never seen anything like the Republicans right now, as far as just misrepresentations of the truth because of what Donald Trump has done."