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The chairmen of three House committees leading the impeachment probe said in a statement this afternoon that the Trump administration tried to block former US ambassador to Ukraine Marie Yovanovitch's testimony today.

“Last night, the Committees learned that the State Department, at the direction of the White House, directed Ambassador Marie Yovanovitch not to appear for her voluntary interview today," the chairmen said.

The chairmen — Reps. Adam Schiff, Elijah Cummings and Eliot Engel — called the attempt to block Yovanovitch from testifying "the latest example of the Administration’s efforts to conceal the facts" and "obstruct" the impeachment inquiry.

After the administration tried to stop Yovanovitch from appearing, the House Intelligence Committee issued a subpoena to compel her testimony this morning.

"As is required of her, the Ambassador is now complying with the subpoena and answering questions from both Democratic and Republican Members and staff," the chairmen said.