Defense Secretary Pete Hegseth struck a defiant tone in a Pentagon news briefing Tuesday, after articles of impeachment were filed against him.

Rep. Thomas Massie, a Republican from Kentucky, reintroduced the articles of impeachment Monday, alleging that the embattled Pentagon chief had committed "high crimes and misdemeanors" and abused the power of his office by violating the War Powers Resolution, conducting military operations without congressional authorization and ordering unlawful military actions in several countries.

Hegseth described the impeachment effor...