Arizona Senator Mark Kelly accused Pete Hegseth Monday of “playing army,” after the defense secretary posted a juvenile meme making light of his military’s extrajudicial executions.  Speaking at a press conference, Kelly nailed precisely what’s so disturbing about Hegseth’s lackluster leadership of the Pentagon: he’s like a little kid playing dress up.   “I mean think about this, he runs around on a stage talking about lethality and warrior ethos and killing people. We have the most competent,