Washington (CNN) House Intelligence Chairman Adam Schiff on Saturday again called on White House acting chief of staff Mick Mulvaney and others to comply with congressional subpoenas and testify before Congress in the impeachment inquiry into President Donald Trump.

Schiff said in a statement that Mulvaney "not only has refused to testify, but actively worked to block others from complying with subpoenas, and refused to provide Congress with documents relating to Trump's suspension of Congressionally approved military aid to Ukraine."

"This is the same Mick Mulvaney who publicly admitted from the White House podium that Trump withheld the military aid in order to pressure Ukraine to conduct investigations meant to help the President's re-election campaign, and the same Mick Mulvaney who was a direct firsthand participant in and witness to the scheme," Schiff continued.

CNN has reached out to the White House and Mulvaney for comment.

Last month, Mulvaney made a stunning admission at a White House press conference and confirmed Trump froze nearly $400 million in US security aid to Ukraine in part to pressure that country into investigating Democrats. Hours later, Mulvaney attempted to backtrack and denied ever making the admission.

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