You're forgetting the Dow Jones is over 50k

Constitutionally, war should go through congress.

But we haven't followed the constitution in a very long time, obviously... decades

that's what makes someone like Trump possible, and here we are.

Congress gave the president the power to wage an unlimited amount of war so long as troops are removed by the 90 day mark. Even then if troops are gone before the court rules, it doesn't matter either, as was ruled under Clinton.