war powers act

Updated 9:15 p.m. ET

The House of Representatives approved a resolution that would force President Trump to seek consent from Congress before taking new military action against Iran.

The move comes nearly a week after President Trump greenlighted a U.S. drone strike that killed a top Iranian general and led to increased tensions with Tehran.

GOP Sen. Mike Lee of Utah says he found a classified military briefing from administration officials Wednesday so "upsetting" that he will now back a proposal to limit President Trump's power to take military action against Iran and to reassert Congress' role in authorizing the use of military force.

Updated at 7:19 p.m. ET

Congressional Democrats are promising to act this week to limit President Trump's ability to unilaterally order military action against Iran.

In a letter to House Democrats, Speaker Nancy Pelosi, D-Calif., called last week's drone airstrike against Iranian Maj. Gen. Qassem Soleimani "provocative and disproportionate," saying the strike "endangered our servicemembers, diplomats and others by risking a serious escalation of tensions with Iran."