It's difficult to have these conversations when people are constantly terrified of "what trump wants" instead of what he is actually capable of. I'm amazed at how much power people think the president has.
The President has power over things affected by his executive privilege. Like the State department, for instance, which has experienced massive hemorrhaging of personnel, is barely staffed, and is ensuring that the US has less than the bare minimum of institutional knowledge and capacity to maintain its (good or bad) hegemony over the world's affairs. This could have momentous long term effects.
The President plus Congress plus the Supreme Court has all the power, though. The first two would love to roll back pollution controls, and the last one is teetering. The main thing preventing it right now is that the ruling party has forgotten how to rule.
