Russia's economy is only slightly larger than Los Angeles County according to this article:
http://claremont.org/writings/crb/spring2005/tartakovsky.html
We will not need a "space force" until we have a permanent, self-sustaining civilian presence in space whose security is somehow threatened.
Weaponizing orbital platforms, however, well, that's just a given.
You'll be singing a new tune real quick when the Borg get here!