Building on James’ post yesterday, Medvedev’s announcement about putting missiles in Kaliningrad shows that the Russians are quickly becoming their own worst enemy. Why Medvedev would revert to clumsy chest thumping at a time when cooler heads are set to retake Washington is just mind-boggling. I get that this move is great red meat for the Russian street. But does Medvedev really think that turning missile defense into a pissing match with the next U.S. administration will convince Washington to back away from the third site? Come on, comrades, let’s get real here…