Republican Representative Liz Cheney thrashed former President Donald Trump on Sunday, saying ‘he crossed lines no American president has ever crossed before.”

Cheney is part of the House select committee charged with investigating the January 6 Capitol Hill insurrection. In an interview on ABC’s ‘This Week’, the Republican representative from Wyoming, said, “When a president refuses to tell the mob to stop, when he refuses to defend any of the coordinate branches of government, he cannot be trusted.”

Commenting on the President’s inaction during the attack, she said, “The committee has firsthand testimony now that [Trump] was sitting in the dining room next to the Oval Office watching the attack on television.”

In fact, she added that the investigation had received firsthad testimony that Trump’s daughter Ivanka went in at least twice to ask him to stop this violence.

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“He could have told them to stand down. He could have told them to go home – and he failed to do so,” Cheney said. “It’s hard to imagine a more significant and more serious dereliction of duty than that.”

When asked if Trump’s failure to intervene amounted to criminal negligence, she said that there are several “potential criminal statutes at issue here.”

“But I think that there’s absolutely no question that it was a dereliction of duty, and I think one of the things the committee needs to look at is we’re looking at a legislative purpose is whether we need enhanced penalties for that kind of dereliction of duty,” she continued.

The representative highlighted that the party had a choice to either be loyal to the Constitution, or to Donald Trump. 

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Speaking about the work the committee has done, Cheney, one of the two Republicans part of the congressional panel probing the attack, said, “This committee gives me hope. It is very much one that brings together a group of us who have very different policy views, but who come together when the issues have to do with the defense of the Constitution. So, that does give me hope.”

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She added that her party has a “particular duty” to not only reject the events of that fateful day, but “to make sure that Donald Trump is not our nominee, and that he’s never anywhere close to the reins of power ever again,” reported ABC News.