The US is more powerful than Russia by a decent margin. However, they're certainly powerful enough to keep us from wanting to actually go to war with them.
You're certainly right about how divided we are.
The one potential silver lining with this is that it's the type of thing that generally unites us. However, I am skeptical of our ability to unite right now, and there are plenty that would rather use this to be divisive, plus even some that would actually side with Russia.
The division in our country has contributed greatly to the weakness.
( A house divided and all that.)
The ones who may side with Russia are extremists and they can't ever be counted on. More importantly, I don't think this conflict hits close enough to home to unite the country at this point.