We'll need a complete sweep by Dems of Congress and by liberals of the Democratic party to undo The Heist. We're talking about the sort of complete change of mind that accompanied the Progressive Era or the New Deal. There's no way to undo the rot with the cast of characters that inhabit DC right now, from both parties. It's a Plutefest.
Most of Dump's damage will be undone by restaffing with competent people, re-passing legislation, and re-regulating. We should take this as an opportunity to go a lot farther than before. Use Dumpy as the Fire of London and build a new and better city rather than trying to rebuild the old, half-as-sed one. Hated Obamacare? Fine, here's Single Payer. Hated Sarbanes-Oxley? Fine, here's real regulation.