Updated 2:47 p.m. ET, 7/17/2014
(CNN)–House Oversight Committee Chairman Darrell Issa, a Republican, and the panel's top Democrat, Elijah Cummings, have clashed repeatedly.
And now they're at it again.
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A day after sparring over a committee subpoena of a top White House official, Cummings of Maryland blasted Issa for using the committee as "center stage for political theater."
Cummings told CNN's Kate Bolduan on "New Day" that it was wrong for Issa to try to compel testimony from David Simas, director of the White House Office of Political Strategy and Outreach.
Issa is looking into that unit and is demanding to know whether Simas' duties violate the Hatch Act, which bars most federal employees from engaging in partisan political activities.
Cummings has said Issa lacks any evidence to show Simas or his staff violated the law.
"It is time for this committee … to fulfill their responsibilities under the Constitution to conduct responsible oversight," Cummings said.
Issa contends the White House has delayed providing the panel with information about the recreation of Simas' office in January.
It was closed prior to President Barack Obama's reelection campaign and Simas worked on that effort.
On Wednesday, Issa convened a brief hearing, but Simas did not show up.
Office of Special Counsel chief Carolyn Lerner, whose office enforces the Hatch Act, and a top deputy, said that the White House appeared to be in compliance with the Hatch Act
Despite Simas' absence at the hearing, there was still a heated exchange between Issa and Cummings.
"We do not simply haul in one of the President's top advisers at will," Cummings said. Cummings continued, saying Issa's actions are simply producing a "distraction."
Issa and Cummings have long sparred over committee procedures and investigations.
Cummings also blasted Issa for not consulting with him on whether to issue a subpoena in this case.
"He's supposed to have consultation with me," Cummings said. "Rarely do we have consultation. There has never been debate, votes, nothing."