Kentucky Republican Representative Thomas Massie has moved to impeach Defense Secretary Pete Hegseth, citing the administration’s conduct surrounding the Iran war as grounds for removal.

Massie, one of Congress’s most outspoken libertarian-leaning Republicans, has long been a vocal critic of military interventionism and executive overreach in matters of war and foreign policy.

The impeachment resolution marks a significant break within the Republican Party, with a sitting GOP congressman directly challenging a cabinet official appointed by a Republican president.

Hegseth, who has served as Secretary of Defense, has been a central figure in the administration’s decision-making around military operations involving Iran.

The move by Massie reflects growing unease among a faction of Republicans who have questioned the legal and constitutional basis for military action against Iran without explicit congressional authorization.

Impeachment of a cabinet official is a rare and politically charged maneuver, requiring a majority vote in the House before any trial could proceed in the Senate.

Massie’s resolution is unlikely to advance given the current Republican-controlled Congress, but it places formal pressure on the administration and forces members to take a recorded position on Hegseth’s conduct.

The Iran conflict has become a flashpoint in domestic American politics, with debates intensifying over who holds the authority to commit U.S. forces to hostilities abroad.

Critics of the administration argue that bypassing Congress on matters of war undermines the constitutional framework that reserves the power to declare war with the legislative branch.

Massie’s challenge to Hegseth underscores the deepening fractures within the Republican coalition over foreign policy, military spending, and the limits of presidential war powers.

The impeachment push is expected to draw sharp responses from both the White House and Republican leadership, who have largely backed the administration’s approach to Iran.

Whether the resolution gains any additional co-sponsors or broader momentum will be a critical test of how far anti-interventionist sentiment has spread within the current Congress.