House Oversight and Government Reform Committee Chairman Darrell Issa (R-CA) (C) orders ranking member U.S.Rep. Elijah Cummings' (D-MD) microphone turned off after adjourning a hearing in the Rayburn House Office Building March 5, 2014 in Washington, DC.

House Oversight and Government Reform Committee Chairman Darrell Issa (R-CA) (C) orders ranking member U.S. Rep. Elijah Cummings’ (D-MD) microphone turned off after adjourning a hearing in the Rayburn House Office Building March 5, 2014 in Washington, DC.

*House Democrats on Thursday slammed Rep. Darrell Issa (R-Calif.), calling his decision to abruptly end a hearing he was leading “disrespectful” and “outrageous” and calling on Republican leadership to strip him of his committee chairmanship.

In a strongly worded letter to House Speaker John A. Boehner (R-Ohio), the Congressional Black Caucus lashed out at Issa, who on Wednesday halted a hearing of the Oversight and Government Reform Committee without allowing any Democrats to speak. At one point, he turned off the microphone of the panel’s ranking member, Rep. Elijah Cummings (D-Md.), as he was speaking. [Click through to watch.]

“Mr. Issa is a disgrace and should not be allowed to continue in a leadership role,” wrote Rep. Marcia Fudge (D-Ohio), who leads the Congressional Black Caucus, in the letter to Boehner.

Wednesdays hearing on the Internal Revenue Service’s targeting controversy turned tense when former IRS official Lois Lerner invoked her Fifth Amendment right and declined to testify. Issa then adjourned the meeting of the House Oversight and Government Reform Committee.

Cummings asked that the hearing be continued so he could speak, but Issa refused and had Cummings’s microphone cut off. Republicans on the panel, led by Issa, then walked out of the room while the Maryland congressman continued to speak.

Cummings told reporters on Thursday that several Republican members of the committee have since apologized to him for Issa’s conduct. But Boehner defended Issa’s actions during his weekly news briefing, saying that the California congressman was not out of line to cut off Cummings’ microphone and walk out.

“He was within his rights to do what he did,” Boehner said, later adding: “Darrell Issa is the chairman, he’s done an effective job as chairman and I support him.”

House Democrats also attempted Thursday to introduce a resolution condemning Issa’s behavior at the hearing and have called on him to issue a public apology to Cummings. However, in a party-line vote, the House tabled the resolution.

That CBC’s outrage was echoed by House Minority Leader Nancy Pelosi (D-Calif.) who told reporters at her weekly press briefing that Issa’s behavior toward Cummings was disrespectful.

“I can’t see how Republicans wouldn’t be running…to disassociate themselves from such behavior,” she said. “You would think they would be heading to the hills.”