How about the United States or Divided States (as some outsiders call it), split the country in half. All the democrats move to one side and republicans move to the other. Build a wall in between
problem solved? 
so much infighting and nasty politics. It has gotten worse with social media
Give the Dems the west coast and the northeast (split PA in half). They can carve out Chicago, too, sort of like Cold War Berlin. Everybody’s happy.
Nope, I'm holding out for NH to become our own country. I suppose Maine can join us if you don't want to be isolated.
Progressives can have the west coast and north east, conservatives can have the middle states and southeast, and libertarians get NH (which also would absorb Maine).
What about Moderates?
Us "Elephonkies" as CNN calls us - DO exist.
I'd humbly suggest you send Moderates to EVERY state - to add BALANCE. Need someone with some sanity left - to hold us all together.
Lots of moderates and progressives in Southern NH -- don't forget their senators are Maggie Hassan (also former governor) and Jeanne Shaheen. What KG might would need to do is divide NH north of Concord (plus western NH) to join up with Maine.
As long as I get to keep the lakes and mountains, I'll be happy. The rest is slowly becoming just like Massachusetts anyway, you can keep the crappy part, it's not worth the hassle. 
Sounds like a fair trade to me. Hope our borders and visitations can be friendly and welcoming. Pre-Covid I used to work a couple of days a month in Lakes and North Country. It's pretty there, though I'd never want to live there. We can all still be Celtics fans.
I'm up for a good multi-nation secession if Trump is re-elected. I think President Baker and President Sununu can work cooperatively.
You and I would have better luck, and yes it would be highly cordial. I'm not really a big Sununu fan anyway. He's okay in a lot of regards, but he's definitely more of a conservative than a libertarian. In this hypothetical I'm not looking for a conservative or progressive country, I can do without their either form of authoritarianism just the same. But as for Sununu and Baker, I'm not sure how well they get along. Sununu is currently suing Baker over Massachusetts taxing NH's remote workers and now they're trading barbs. I'm not sure if SCOTUS will take the case or not but it's the one thing that has united NH politicians more than any other recently.
But being real for a minute, if this falls apart it's not going to be clean and easy, it's going to be messy. It'd be a miracle for there to not be bloodshed. I can't see a dissolution of the union and states all becoming independent (with free will to merge as they each see fit) going smoothly and peacefully. It's not something anyone should want. I still believe it would be best if someone can lead us off the ledge. I don't see who that person is, and maybe it isn't any single individual, but something needs to change. Someone needs to lead.