Classically, Congress held the power of the purse, able to both bar and require spending. This imposed a significant limit on Presidential power. With a bought court supporting him, Trump would have significant ability to essentially chart power as a king.
This has been an ongoing problem — if a Republican announces plans to do something sufficiently evil, people won’t believe it because of how awful it is.
And once it happens it’s okay regardless of how negatively it affects them as long as it owns the libs.