Jessica Estepa

USA TODAY

In a fiery speech on the House floor, Rep. Al Green called for President Trump's impeachment on Wednesday morning.

"It's a position of conscience for me," the Texas Democrat said. "This is about what I believe. And this is where I stand. I will not be moved. The president must be impeached."

Noting that no one – including the president – is above the law, he called on the American people to let their members of Congress know where they stood. He also said members of Congress had to "make their own decisions" on where they stood about the issue.

Green became the first Democrat in Congress to start calling for impeachment earlier this week, prior to news breaking that the president reportedly disclosed classified information to Russian officials – and before President Trump asked James Comey to drop the FBI probe into former national security adviser Michael Flynn, at least according to memos from the now-fired FBI director.

But Green ramped up his call on Wednesday, amid an onslaught of criticism from lawmakers about the president's recent actions.

"This is not to be taken lightly," he said. "I think this is one of the highest callings that a member of Congress can address."

While many in the Democratic party, including Senate Minority Leader Chuck Schumer of New York and House Minority Leader Nancy Pelosi of California, are still hesitant to start talking about such proceedings, Green wasn't the only Democrat this week throwing the term around this week.

Rep. Maxine Waters of California said during Tuesday's Center for American Progress convention that Democrats shouldn't be afraid to use the word.

"I don’t know what’s going to happen after today, when all of the questions have been raised about him… but I think this is going to put us a little bit further on our way to what I have been calling for for so long, and that is impeachment," Water said, per a Buzzfeed report.

Additionally, Rep. Justin Amash of Michigan became on Wednesday the first Republican to raise impeachment publicly. He told reporters that if the allegations in the Comey memo were true, those would be grounds for impeachment.

Still, many Democrats are wary.

“It’s not something I believe people should wish for," said Rep. Adam Schiff of California, the top Democrat on the House Intelligence Committee, which is conducting its own probe into Russian interference in the presidential election. "We should undertake our constitutional obligation to take the evidence, follow the evidence. And if there’s another constitutional obligation that follows from that, there is.. They’re allegations that were in a newspaper report, but they’re also allegations that are easily subject to proof."

Rep. Elijah Cummings, the top Democrat on the House Oversight and Government Reform Committee, said, he wanted to get information and wasn't "there yet" on impeachment.

"Will it lead to impeachment? I don’t know, but one thing is for sure this is a critical moment," he said.

Contributing: Heidi Przybyla