Cleaning Up After the Trump Elephant

The old joke about following a circus parade and having to clean up after the elephants...?

After Trump leaves office there will be a lot of cleanup needed:

• reestablishing norms for openness, including releasing tax returns, maintaining public records of who visits the White House,  putting assets into blind trusts, not using official events to push political agendas or to sell stuff, etc.
• redoing the interactions with Congress.
• [updated--prohibiting policy announcements by twitter.]

I don't know how we do this.  The natural tendency of each branch of government is to keep their authority, so it may be harder to undo Trump precedents than we'd like to think.