Could US Republican Party lead to Ukraine's defeat and USA being expelled from NATO?

In my mind are various different scenarios that may, or may not be what the future brings.

One possible scenario, given Republican Party rule, in US, is Ukraine being defeated by Russia in the near future. Resistance to Russian rule, from Ukrainian people, would continue to be a thorn in Russia's side so Putin's victory would be similar to George Bush's famous moment on the aircraft carrier during the second Iraq War when he declared "mission accomplished." As history shows, Iraq remained in turmoil with US troops involved long after that moment.

Another part of this scenario holds that our NATO allies, including Canada, reconfigure NATO to, basically, expel the US as a member. This could happen formally, or at least in practice, if not officially. Other NATO members are starting to distrust the Trump Administration with security secrets. They fear information could be passed on to Putin.

I can see sharing my above post to Republican Speaker of the House Mike Johnson, but he would never see it anyway, due to volume of mail and me being outside his district. He, as well as some other Republicans has played lip service to Ukraine remaining independent, but many of his actions and his support of Trump undermine that. The start reality of this situation is likely to face us.

One thought I have had quite often is that Ukraine could temporarily give up the Donbass and Crimea in exchange for protection to the rest of the country. If this could work as a cease fire it could be a step. Who knows what will happen, in the long run, to Russia or Ukraine. USSR did fall and that could happen again.

Looking way back to another, more optimistic era is this comment I placed on another person's post.

Things seemed much better back when the Soviet Union was trying to reform and develop more respect for human rights. The US and the west was trying to help USSR and then Russia reform. Things; especially in Russia, have gotten much worse since then. Maybe the former Soviet Republics broke away too quickly. I think maybe if the Soviet Union had held together a bit longer, the reforms could have had a better chance to take hold. Economic instability and chaos lead to return of authoritarian rule. As it is today, especially in Russia, I think human rights have been extinguished for the near future at least.