I’m with David. He is hugely impressive–brilliant, independent-minded, brave, and a natural leader. My worry will be whether he has the political deftness and experience to navigate what is going to be an enormously complex job at the center of a White House driven by a populist-nationalism with which McMaster presumably has little sympathy. But on the simple principle that it is better to have more impressive people around President Trump rather than fewer, this is a reassuring choice.