At Tuesday’s House impeachment hearing, the Republican counsel questioned Lt. Col. Alexander Vindman about a specific proposition by the Ukrainian government — an offer for Vindman to serve as its defense minister.

Vindman, the National Security Council’s Ukraine expert, said he was asked three times but dismissed the inquiries and added that he found the notion “rather comical.”

Testifying before lawmakers on the House Intelligence Committee, Vindman said each time Ukraine asked, he dismissed it and when he returned to the U.S. he notified his “chain of command and the appropriate counterintelligence folks.”

“I’m an American,” Vindman told lawmakers. “I came here when I was a toddler and I immediately dismissed these offers. Did not entertain them.”

The counsel pressed further, asking, “When he made this offer to you, initially, did you leave the door open? Was there a reason that he had to come back and ask a second and third time or was he just trying to convince you?”

Vindman replied, “Counsel, it’s — you know what? The whole notion is rather comical that I was being asked to consider whether I would want to be the minister of defense.”

“I did not leave the door open at all. But it is pretty funny for a lieutenant colonel in the United States army, which really is not that senior, to be offered that illustrious a position,” he said.

The incident, according to the testimony on Tuesday, took place when Vindman was in Ukraine for Volodymyr Zelenskiy’s inauguration.

Rep. Jim Himes, D-Conn., circled back to the moment at the end of his own round of questions, condemning the counsel’s questions.

“The three minutes that were spent asking you about the offer made to make you the minister of defense, that may have been cloaked in a Brooks Brothers suit and in parliamentary language, that was designed exclusively to give the right-wing media an opening to question your loyalties,” Himes said.

“I want people to understand what that was all about. It’s the kind of attack — it’s the kind of thing you say when you’re defending the indefensible,” he said.

Vindman appeared beside Jennifer Williams, a national security aide to Vice President Mike Pence, at Tuesday morning’s hearing. They are the first current White House officials to publicly testify in the Democratic-led impeachment inquiry.

Both individuals were privy to the July 25 phone call between President Donald Trump and Zelenskiy.

ABC News’ Benjamin Siegel contributed to this report.