@Mr.BR may be the Russian Hillary warned us about but in this post he is telling some wisdom.
That Ukraine area was the heart of Russian culture for centuries.
It's likely why the Mongol horde settled there so as to have control over their capital.
Moscow was a malarial swamp far enough away from the Khans that they could escape some of the occupation while sending tribute to the invader until the married themselves into the countryside or returned east.
The only reason the DonBas region wasn't still solidly Russian was Stalin shoving everything around to make the border satellites bigger buffers from invaders coming from the west.
Ukraine should be bitching to Poland for return of its property.
WWI was continued in 1939 and what we know as WWII is continuing in various places still today.
I agree Russia could be a natural ally in regards to a certain religious fanatic issue and there is more culturally/economically similar in regards to the Asian Communists.
Russia has an economy the size of California's for perspective.
Lots of potential but too much corruption and history to overcome.
Clinton abandoned an opportunity to set a good path when Communism fell. He wanted a peace dividend.
That indifference means the road to deconstructing 700 years of political paranoia will take time.