How do you know what Congress was thinking? You can't read the mind of Congress. Also, the Supreme Court has always restricted the types of laws that Congress

How do you know what Congress was thinking? You can't read the mind of Congress. Also, the Supreme Court has always restricted the types of laws that Congress can pass, based on what the Constitution says. However this doesn't involve Constitutionality. Congress can absolutely pass a law giving this exact power to the EPA and the Supreme Court couldn't touch it.