Republicans objected after a speech from Democratic Rep. Marcia Fudge (Ohio) which contained insults to President Donald Trump and his supporters.
Fudge introduced the letter from one of her constituents during her speech Tuesday on the floor of Congress.
"A mobster, a con man, a gangster in the White House? I think so," the letter began.
The letter criticized House Speaker Nancy Pelosi (D-Calif.) for not pushing for an impeachment vote against the president, and then turned its ire to his supporters.
"It is glaringly apparent that many who support the present administration are either racist, steeped in religious beliefs, ignorant, or, as my mother used to say, just plain dumb," Fudge read.
"They have chosen to support a president who has a proven record of being sexually condescending to women," she continued, "will not oppose the resurgence of the Ku Klux Klan and other hate organizations, is indecisive, is condescending to anyone who challenge him, and hides behind his twitter account rather than dealing with the real issues in our country and around the world."
Fudge also read the accusation that the president is a "proven liar," and described the Republican party as a "Trump cult."
Rep. Larry Bucshon (R-Ind.) complained that Fudge was out of order in her insults to the president, to which she replied, "And so are you!"
Fudge seized headlines in November for challenging Pelosi's candidacy for the speakership of the U.S. House of Representatives. She later relented and backed Pelosi's election.