The only sane course is unilateral US withdraw from NATO.
Because no sane American would go to war with Russia over Bulgaria. Or Romania. Or Latvia. etc.
After the USSR imploded, NATO went looking for a reason to exist. The Russian army today is roughly 10% of the size of the one when the wall fell.
NATO is an immense jobs program for the bureaucrats the EU loves to churn out. There are 4000 people working at NATO HQ. WE pay their salaries. Their main function is to funnel US dollars into countless other projects. Ukraine is probably a good example.
NATO does nothing but waste US money.
(in millions)
United States 730,149
United Kingdom 60,376
Germany 54,113
France 50,659
Italy 24,482
Canada 21,885
Turkey 13,919
Spain 13,156
Netherlands 12,419
Poland 11,971
Norway 7,179
Romania 5,043
Belgium 4,921
We pay almost twice as much as all the other members combined. They are no longer the impoverished nations smoking after WWII. The main enemy is gone. And the other purpose is keeping a problem from arising in Germany.But we and all of Europe support islam pouring in by the millions. So what the hell is nato for?