Truth is you should be awaiting the evidence too. If the evidence says Putin did it, what do you think America should do keeping in mind the state of our troops and the fact Obama is CIC, Jon Cary is SOS, Jeh Johnson is Homeland Security, and Chuck Hagel is Defense Secretary? Are you prepared for more Americans to lose their lives for another war that will probably accomplish nothing, like the others anymore, when those most involved are Europeans. Even they seem fairly disinterested in reacting. All the bleating anger while our guys are supposed to save their bacon one more time while they dole out the socialism at home instead of creating their own military capabilities.
Obama talking tough and making threats is not going to do much.
Who's evidence? Russia's. The Ukraine's. The Canadian and British and Dutch leaders have all indicated that it was done by Russia or their allies. Are they all taking shots in the dark and speaking without evidence? Or have their own intelligence services basically confirmed what the entire freakin' world, minus the Putin admirers around here, already know?