Rationally, I'd say that you shouldn't ally your self with someone just because you think they will win.

Correct. It may be hard for Americans to imagine, but you don't need to stick your paws into absolutely everything everywhere. You can just stay out.

It's feckless behavior

There are reasons to avoid 'bandwagoning', though that refers to joining with a stronger power, but this argument is not one.

and it can become a self fulfilling prophecy.

And?

given what a dancing monkey he was during his russia trip.

Do you have Tucker Derangement Syndrome? Or is it just Russia Derangement Syndrome?