Congress is tasked by the Constitution with making laws that effect the entire country. Congress can change the EPA if they want to do so. Congress is mostly despicable in writing vague laws giving power to bureaucrats and lots of employment to lawyers who file lawsuits because of the deliberatly vague writing in the laws. Is there any real hope that anything will change?
No change. Congress likes the way things are. It gives them political cover and frees them from having to make any decisions or accept responsibility.