House Speaker Nancy Pelosi (D-Calif.) has stood up with Lt. Col. Alexander Vindman after the White House ousted him for having testified against President Donald Trump during House Democrats’ impeachment hearings.

Vindman, Democrats’ key witness in their impeachment inquiry against the president, was fired from the National Security Council on Friday, Feb. 7. Another witness, Gordon Sondland, U.S. ambassador to the European Union, also was ousted.

In a response to the Trump administration’s decision, Pelosi said Vindman’s firing was an act of retaliation by the president.

“Lieutenant Colonel Vindman has proven to be an American patriot: on the battlefield when he earned a Purple Heart, and in the House trial when he spoke truth to power. His brave testimony showed America that right still matters,” Pelosi said in a statement on Friday.

“President Trump is impeached forever,” Pelosi said, regardless of the fact that the Senate acquitted the president of the two charges of abuse of power and obstruction of Congress in a vote on Feb. 5.

The House speaker added that the firing of Vindman was “a clear and brazen act of retaliation that showcases the president’s fear of the truth.”

“The president’s vindictiveness is precisely what led Republican senators to be accomplices to his coverup,” Pelosi said. “The firing of this patriotic soldier is a sad and shameless loss for America’s security.”

Pelosi then praised Vindman “as an American hero,” saying that history will remember him.

White House press secretary Stephanie Grisham said on Thursday that President Trump was glad the impeachment drama was over and “maybe people should pay for that.”