The National Rifle Association’s decision not to endorse Harry Reid in the Nevada Senate race Friday strikes me as a significant one. It probably had a lot to do with his Sotomayor and Kagan votes — underscoring the importance of such votes, for anyone who had any doubts. That’s some long-term significance. More significantly in the short-term though, is that this suggests the NRA thinks Sharron Angle can win this race. It certainly helps to have a friend in the Senate Democratic leader, but he might not be there in January . . .