Congress gears up for vote on Trump's war powers in Iran — after the battle began

Sen. Tim Kaine, D-Va., seen here in January, is one of the Democrats pushing for a vote on a war powers resolution after the U.S. and Israel attacked Iran.

Democrats and a few Republicans are calling for curbing Trump's unilateral use of military power in Iran, despite previous such efforts failing to advance.

(Image credit: Chip Somodevilla)