The Trumpers and GOP enablers have been saying that all the evidence so far that Trump was going for quid pro quo with Ukraine was all second- or third-hand and therefore wasn’t worth believing.

Well, guess what.

A White House national security official who is a decorated Iraq war veteran plans to tell House impeachment investigators on Tuesday that he heard President Trump appeal to Ukraine’s president to investigate one of his leading political rivals, a request the aide considered so damaging to American interests that he reported it to a superior.

Lt. Col. Alexander S. Vindman of the Army, the top Ukraine expert on the National Security Council, twice registered internal objections about how Mr. Trump and his inner circle were treating Ukraine, out of what he called a “sense of duty,” he plans to tell the inquiry, according to a draft of his opening statement obtained by The New York Times.

He will be the first White House official to testify who listened in on the July 25 telephone call between Mr. Trump and President Volodymyr Zelensky of Ukraine that is at the center of the impeachment inquiry, in which Mr. Trump asked Mr. Zelensky to investigate former Vice President Joseph R. Biden Jr.

“I did not think it was proper to demand that a foreign government investigate a U.S. citizen, and I was worried about the implications for the U.S. government’s support of Ukraine,” Colonel Vindman said in his statement. “I realized that if Ukraine pursued an investigation into the Bidens and Burisma it would likely be interpreted as a partisan play which would undoubtedly result in Ukraine losing the bipartisan support it has thus far maintained.”

Burisma Holdings is an energy company on whose board Mr. Biden’s son served while his father was vice president.

“This would all undermine U.S. national security,” Colonel Vindman added, referring to Mr. Trump’s comments in the call.

The colonel, a Ukrainian-American immigrant who received a Purple Heart after being wounded in Iraq by a roadside bomb and whose statement is full of references to duty and patriotism, could be a more difficult witness to dismiss than his civilian counterparts.

“I am a patriot,” Colonel Vindman plans to tell the investigators, “and it is my sacred duty and honor to advance and defend our country irrespective of party or politics.”

He was to be interviewed privately on Tuesday by the House Intelligence, Foreign Affairs and Oversight and Reform Committees, in defiance of a White House edict not to cooperate with the impeachment inquiry.

Read his whole opening statement here.

This shit’s getting real.