This is a brilliant thing for Americans, I'm very jealous.
However, they have to be cautious, if the US and Russia become allies it will COMPLETELY shake up the world's dynamics. Most of the US's existing allies see Russia as an enemy. While I wish my country would become allies with Russia (imagine, the dominance and POWER

), the sad truth is that they aren't right now and the media is very hostile towards Russia at every opportunity. However, I think more and more people are seeing how unfair the media in Western countries is towards Russia and Putin, because we can go on the Internet and find out what Putin is really like, and he's not THAT bad when you do your own independent research!
So I honestly think the PEOPLE of most Western countries won't mind Russia and the US becoming allies, but the ELITES are a whole different matter, and at the end of the day the ELITES are the ones who get their say, they are the ones who get to decide everything (including when and where a war happens...). Most Western countries aren't blessed enough to have their own Donald Trumps (yet).
However, if the US and Russia are allies, they'll be SO powerful! It will be difficult to stop them. Trump and Putin are two strong alpha males, my leader is a wimp compared to them, and will likely be submissive towards such a powerful coalition.