rogue nation/rogue state
according to an opinion piece in The Nation, "After the cold war, we labeled our potential adversaries 'rogue nations'—violent, lawless, willing to trample the weak and ignore international law and morality to enforce their will. Now ... there is a growing consensus that the world's most destructive rogue nation is the most powerful country of them all." On the lighter side, a rogue nation has been defined as a "country that buys its military hardware from France, China, or Russia and not from the United States" (Justin Rezzonico, in Katrina vanden Heuvel's Dictionary of Republicanisms).
