Exclusive: Donald Trump’s appointment of war hawk John Bolton is a cause for concern, Daniel Lazare writes, but what is perhaps an even bigger concern is that both major U.S. political parties are dominated by war hawks.

John Bolton is a hawk’s hawk, a militarist who never saw a U.S. war of aggression he didn’t like. The best thing one can say about his appointment as national security adviser is that Trump will probably ignore him the way he does all his other advisers and fire him six months down the road.