The committee dustup between Oversight and Government Reform Chairman Darrell Issa and ranking Democrat Elijah E. Cummings has Democrats and Republicans at each other’s throats and demanding apologies.

On Wednesday, Issa cut off Cummings’ microphone after abruptly adjourning a hearing with IRS official Lois Lerner. Issa spent about 15 minutes asking Lerner questions, even though she made it clear she would be invoking her Fifth Amendment right against self-incrimination. But before Cummings could speak, Issa adjourned the committee.

When Cummings protested and asked for the chance to ask a procedural question, Issa gave him a moment to do so. But when the Maryland Democrat launched into statement attacking Republicans, Issa cut him off.

“We’re adjourned. Close it down,” Issa told committee staff.