Let’s stipulate up front: Ken Paxton is not the most magnetic speaker. His voice is surprisingly soft, his affect somewhat listless. He doesn’t so much command a room as take up space in it. But swagger comes in different forms, and there’s a reason 150 or so Paxton fans showed up on a Tuesday at 2 p.m. in the far north Austin suburb of Leander to hear the attorney general talk about the inner workings of the race for Speaker of the Texas House. There may not be a ton to do in Leander on a Tuesday afternoon, but you have to be a special type of politics sicko to block out an hour to hear about the evils of, say, a state rep from…