WASHINGTON (AP) — The House is set to vote Tuesday on whether to advance an effort to impeach Defense Secretary Pete Hegseth, who has accused lawmakers of undermining American troops in war zones by targeting him over mere “policy disagreements.”

The procedural vote will either block the impeachment resolution or set up a final vote Wednesday. With Democratic leadership backing the effort brought by GOP Rep. Thomas Massie, the outcome will likely hinge on whether Republican lawmakers break ranks after their sweeping losses in the midterm elections.

Hegseth dug in for a congressional fight in his first news conference in months on Tuesday, portraying Massie as a rogue lawmaker and arguing that he had committed none of the high crimes required in the Constitution for his removal. He framed the effort as an indictment against the nation’s service members and their successes while undermining American forces “in real time.”

“This is not patriotism,” Hegseth said. “This is sabotage.”

Massie’s resolution includes eight counts of impeachment. It largely focuses on the war in Iran but also includes references to Hegseth’s role in carrying out military actions in Yemen and Venezuela.

Massie, a Kentucky Republican leaving Congress in January after losing his primary to a Trump-backed opponent, says Hegseth has “knowingly executed and implemented unlawful orders.”