"We know that it's completely impeachable and completely illegal," the former White House communications director said in reference to Trump's actions towards Ukraine.
"Impeachment is always constitutional if it originates in the House and if its basis is arguably for treason, bribery or other high crimes and misdemeanors," wrote Andrew Napolitano in an op-ed.
"There are multiple levels of misconduct here and look, there were 12 people on that call that the president made to the Ukraine president," Representative Stephen Lynch said.
Trump gave Turkey the green light to invade northeastern Syria after a phone call with Turkish President Erdoğan last Sunday.
Longtime White House correspondent Sam Donaldson said President Trump's supporters love him because they want a "white Christian country" back. But he said Senate Republicans will gladly convict him if public support for impeachment continues to rise.
"This is pretty uncharted territory for many of us and even for Congress," the Democratic congresswoman said.
"I think we ought to be prepared to go all out on this," Congressman John Garamendi said.
"No foreign government should ever be involved in a U.S. election in any way," Representative Adam Kinzinger told Fox News.
"You'll have a very Democratic Senate next year," former Massachusetts Governor Bill Weld said.
Former Illinois GOP congressman and 2020 presidential candidate Joe Walsh demanded members of his party vote to impeach President Donald Trump, labeling him a "traitor" to the United States
Nick Burns also said the president's efforts with Ukraine and China are "one of the worst things he's ever done to our democracy."
"They will give cover to crazies who crave violence, as other intemperate words of his have done," Andrew Napolitano wrote.
"When the Access Hollywood tape came out, [Trump was] calm, cool and calculated," Brian Kilmeade said. "You could argue that's more devastating than any of this."
Peter Navarros argued that Democrats could be "more dangerous" than China, Russia, Iran and North Korea.
"Now that's a horrible way to run a government," Representative Mike Quigley said.
"This is moving very quickly and yet the White House still seems ill-prepared," Joe Scarborough said.
Fox News host Mark Levin clashed with chief national correspondent Ed Henry as the journalist attempted to ask him questions about the Trump-Ukraine scandal.
"I've asked you a specific question, I'd like a specific answer," Chris Wallace said in a heated exchange with Trump's senior adviser Stephen Miller.
"The radicals have been resisting and salivating at the chance to get revenge for their 2016 loss," the controversial conservative commentator claimed.
"I think the markets have factored in this idea that the president's opponents will stop at nothing to try to undermine and ultimately destroy him," Monica Crowley said.
"You don't expect presidents to do that and it was completely inappropriate," Kasich said.
"It is a felony to ask for or to receive, to conspire and plan for, to attempt to acquire aid for a presidential campaign from a foreign government or foreign national," Andrew Napolitano said.
"The politics of it will get worse and worse for Trump," Mike Murphy said.
"I am hopeful that they will put the country before their political interests," Representative Debbie Mucarsel-Powell said.
The transcript of Trump's call with Zelensky shows that he repeatedly pressured the Ukrainian president to investigate Biden's son's business dealings.
The View's Meghan McCain challenged her liberal leaning co-hosts and House Democrats to finally impeach President Donald Trump because she's sick of hearing "everybody bitch" and complain.
Ocasio-Cortez, a key figure in the Democratic party's progressive caucus, has publicly backed impeaching Trump since June.
"Are they trying to lose?" ex-White House ethics chief Richard Painter said of Democrats and the 2020 election.
"Impeachment polls right up there with skim milk among the American people," Sen. John Kennedy (R-La.) said.
Critics are mocking Fox News correspondent-at-large Geraldo Rivera Thursday after he challenged anyone seeking impeachment of President Donald Trump to a fight.