Thomas Massie filed eight articles of impeachment against Pete Hegseth on Monday, charging the defence secretary with taking the US into three wars Congress never approved and with killing at least 243 people on boats at sea without trial.

The Kentucky Republican's resolution is privileged, so House leaders must act on it within two legislative days, which puts a vote no later than Wednesday. It goes to the outgoing House, where Republicans hold the majority until January. Only four Republicans, Massie among them, backed the war powers resolution that passed 215 to 208 in June.

Hakeem Jeffries, the House Democratic leader, said on Sunday that he is a "hard yes" and that Hegseth "has got to go". Hegseth called the charges "sham articles of impeachment" in a video. Removing him would take two thirds of the Senate, and there is no sign of that.