IMO the best way to defeat Russia’s invasion of Ukraine is to unleash American oil and gas production. it would bankrupt Russia. You may have noticed that Russia didn’t invade Ukraine when energy was cheap during the Trump administration, and invaded during the Obama and Biden administrations when energy was/is expensive.
That would make quite a difference. It’d take some time, but quite a bit less time if we’d embarked on such an energy program the day our intel indicated that yes, Pooty would invade. Plus the benefits to the US would be enormous.