It was the Trump administration that started the negotiation process with the Taliban for the withdrawal of U.S. troops from Afghanistan, so I doubt much would change.

As for Ukraine, the problem about Trump is that he's pretty pro-Putin but he tried not to show it throughout his presidency due to the 2016 scandal about Russia helping Trump in his election campaign. So honestly it's hard to say - most likely he wouldn't aid Ukraine due to him probably not wanting to help "a lost cause", leading to protests against him.

That makes sense. Thank you. Also this won't be totaly important until we actually get to 2024, but does anybody think Trump would be satisfied with the legal two terms, or would he try to be President forever?

Maybe Trump would make several attempts to amend the constitution to make sure he can remain president much longer, though I doubt it'd be successful.

Probably not. Thank you.

Well, Russia would never invade Ukraine if Trump had been in office. Also, I'd just like to say: Trump was and is not pro-Putin (just wanted to put that out there). The Taliban, we were already pulling our troops out slowly, but we were a bit to go. Had some equipment to destroy or take out, some civilians and green-card holders, but we were moving along. So, the world would be more peaceful than it is now, and the Taliban probably wouldn't've taken over as much as they did.

Personally I disagree about the invasion not happening under Trump. Sooner or later, tensions would've escalated in Ukraine and Russia would've invaded Ukraine.