1. Crimea was 2014 even as a VP, Biden didn't have the final say
2. The exit from Afghanistan started in 2012...by the time the US left there were less than 5000 troops on the ground....even with 200,000 NATO troops, the Taliban still prevailed....there was a big plan for the US to leave Afghanistan and the same thing would have happened with Trump in charge.
3. Russia and the world are in the same boat-all countries are financially strapped right now.
4. Ukraine was non-admissible due to it having internal strife with the separatists
5. Don't know
6. Regardless of his tolerance, there was open combat occurring in those regions between separatists and Ukraine forces
7. This refers to question #4 Ukraine was involved in an open dispute with Russia...if NATO would have admitted them, that open dispute would have then become NATOs problem....