If America wants to have any real international standing, they really do need to impeach Donald - else every Diplomat will be very aware that 4 years is a very short time and there's a non-zero chance things will again turn. Sure even if Donald was prevented from returning to office Ivanka might decide that she's got the experience required (photogenic, white, sociopath) to make it to the top and she might just manage to get a coalition to get there but even she would be nowhere near as bad and I imagine the International stage would view her as someone they could do business with.

Biden's speech appeared heartfelt - but the cynic in me thinks he's been a politician for 50 years so I would expect he can fake some emotion. The rhetoric was pretty anodyne and was almost interchangeable from what many of his predecessors (Compassionate conservatism / Yes We Can / It's the Economy Stupid / Kinder, Gentler Nation and so on).

I hope he chooses to be almost the "no party President" - it seems agreed he only wants one term so doesn't need to go for personal glory. And if he can frame things as a win for the country rather than for a specific party he might have more chance at getting Congress to pass some meaningful laws. This would be super tough with baiting from both within and without but he could say "save it for the 2024 campaign". A tougher question is - are there enough areas of mutual benefit that he'd get the numbers to pass things?

Failing that, just stick to the tried and tested putting all legislation in the Funding Bill and play Federal Chicken.