National Review posts a quote from Wall Street Journal columnist Bret Stephens that just about says it all:

Bret Stephens, who is becoming one of my favorite columnists, in today's WSJ (no free link):

It's time we start thinking of Vladimir Putin's Russia as an enemy of the United States.

This isn't simply because a former KGB agent turned Putin critic died last week in London after ingesting a dose of polonium 210, an element that usually functions as a neutron trigger in atomic bombs. Nor is it that Alexander Litvinenko's death is the latest in a series of killings, attempted murders, imprisonments and forced exiles whose victims just happened to be prominent opponents of Mr. Putin. It is because the foreign policy of Russia has become openly, and often gratuitously, hostile to the U.S. ...

There is no case for Russia's continued participation as the eighth member of the Group of Seven, once a club for mature democracies only. Putting Mr. Putin on notice that only gentlemen belong in gentlemen's clubs would be the right first step. Treating him for what he is — "unworthy of the trust of civilized men and women," as Litvinenko wrote from his deathbed — would be the next.