US executive doesn't need congress approval to kill heads of US designated terror groups (IRGC). At least it doesn't seems so.

(I guess it already has it)

It's disheartening to see parent downvoted, but executive overreach and emergency powers have been normalized for a while now. Republicans are a lost cause here too, but Democrats despite constant screeching about "constitutional norms" seemingly don't care about war powers either (perhaps the most important constitutional power).

> Aren't we supposed to need congressional approval to start a war?

Not for the last few decades, no.