Actually it was approved but your retards do not know how Senate procedure works but that is another story...
If you're talking about the bombing of Libya. There was no congressional approval and he didn't have to under the War Powers Act. I don't like it whether Obama or Trump uses it. I think it goes against the original intent of the constitution and leads to an imperial presidency.
An inside account of the president's pre-war decision making reveals how the public was misled and the constitution ignored.