Rep. Al Green Alexander (Al) N. GreenThe Memo: Trump's race tactics fall flat Trump administration ending support for 7 Texas testing sites as coronavirus cases spike The Hill's Coronavirus Report: Miami mayor worries about suicide and domestic violence rise; Trump-governor debate intensifies MORE (D-Texas) called Monday for President Trump to be impeached following the firing last week of FBI Director James Comey.

In a statement released Monday, Green said Trump is not "above the law."

"He has committed an impeachable act and must be charged. To do otherwise would cause some Americans to lose respect for, and obedience to, our societal norms," he said in a statement.

Trump cited Comey's handling of the investigation into Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE's use of a private email server as his reason for firing Comey, while Democrats have raised concerns that Trump fired the FBI director to disrupt the investigation into possible ties between Trump's campaign and Russian election interference.

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"President Trump has committed an act for which he should be charged by the U.S. House of Representatives. The act is obstruction of a lawful investigation of the President's campaign ties to Russian influence in his 2016 Presidential Election," Green added in his statement.

Green also pointed to the president's recent tweet in which he said Comey should hope there are no "tapes" of their conversations about the investigation "before he starts leaking to the press."

"These acts, when combined, amount to intimidation and obstruction," Green said.

"I have said on previous occasions, and do now say again, the President should be impeached. I also say that this can happen with a Republican-controlled House and Senate if the public weighs in by demanding that the Republican President be charged by way of impeachment."

Others Democratic lawmakers, including Rep. Maxine Waters (D-Calif.), have discussed the possibility of impeaching Trump. But any impeachment effort will likely be impossible as long as Republicans control the House.

Trump's move last week to fire Comey drew heavy criticism from Democrats and some Republicans.

A number of people compared it to Watergate, the scandal that led to former President Richard Nixon's resignation.