Lt. Col. Alex Vindman, the top Ukraine expert at the National Security Council, was pushed out of his role Friday months earlier than expected, according to a statement from his attorney. Vindman was not slated to leave until July, but had been telling colleagues in recent weeks he would likely leave soon. It was not his decision to leave, however, according to one person familiar with the situation.

President Donald Trump has continued to fume privately about Vindman’s testimony during the impeachment inquiry, and some Democrats say the move is clearly retribution for it.

Vindman is expected to return to the Pentagon, though it’s still unclear what his assignment will be until he’s expected to attend war college this summer.