House Foreign Affairs chairman subpoenas Secretary of State Pompeo

The subpoena issued by Rep. Eliot Engel demands the top US diplomat provide "all records purportedly dealing with the Bidens and Ukrainian energy company Burisma Holdings the department has produced to Republican-led Senate committees" as well as "internal State Department correspondence about responding to Congress."

The subpoena requires documents be turned over by August 7. CNN has reached out to the State Department for comment.

Congressional Democrats have criticized the State Department for stonewalling their requests while complying with Republican ones.

Senate Homeland Security and Governmental Affairs Chairman Ron Johnson of Wisconsin and Senate Finance Chairman Chuck Grassley of Iowa have sought a host of records as part of their investigations involving former Vice President and presumptive Democratic presidential nominee Joe Biden and his son's work at the Ukrainian energy company.

President Donald Trump and his allies have repeatedly made unfounded and false claims to allege that the former vice president and his son acted corruptly in Ukraine.

According to a statement from the House Foreign Affairs committee, it "learned that the State Department has produced 16,080 pages of allegedly responsive material to the Senate Committees since February."

During an appearance before the Senate Foreign Relations Committee Thursday, Pompeo committed to Johnson that the State Department would "do our best to be responsive" to his and Grassley's document requests.

In a statement Friday, Engel slammed Pompeo, saying he "has turned the State Department into an arm of the Trump campaign and he's not even trying to disguise it.

"After trying to stonewall virtually every oversight effort by the Foreign Affairs Committee in the last two years, Mr. Pompeo is more than happy to help Senate Republicans advance their conspiracy theories about the Bidens. I want to see the full record of what the department has sent to the Senate and I want the American people to see it too," the New York Democrat said.