The president isn't empowered to declare war, but as Commander in Chief he is empowered to send the military anywhere he wants and start whatever "conflict" he wants, for whatever reason he wants, including no reason whatsoever. After which Congress can retroactively declare it a war if they so choose. But the US hasn't fought a declared war since WW2, because declarations of war don't really mean anything when the missiles have already been fired and the bombs have already been dropped.
I hate Trump as much as anyone with a moral core should, but the President's capacity for creating arbitrary military violence and expenditure has always been unchecked.
If that’s true, that’s insane. Forgive me, I’m not a PolSci scholar. Nobody in the cabinet can speak up and overrule his whimsy? It always annoys me when the headlines are “Trump invaded this …” or “Trump slapped a tariff on…” while effectively it’s the US government that’s doing that, they are letting him to do as he pleases? Then the fault lies not with him. He’s not a king but surely seems to have absolute discretion if you believe the headlines.