Democrats are concerned that authorizing a huge Pentagon budget would be seen as approval of the war on Iran that began with strikes by the US and Israel on February 28.

"Simply throwing more money at an out-of-control military operation is not strategy," said Sen. Tammy Duckworth.

Senate Democrats have blocked a $1 trillion annual defense bill in protest of President Donald Trump’s war against Iran.

President Donald Trump notified Congress of the renewed conflict in a letter to Senate President pro tempore Chuck Grassley (R-IA).