quick correction, the NRA is even more forgiving than I thought.
If an incumbent has an A, they will receive support, but even more than that, if an incumbent is B-rated, the NRA will not actively oppose them, even if the challenger is an A.
Reid was B-rated in 2010, Sharron Angle was A-rated. The NRA decided to endorse neither candidate, and stayed out of the race.
how many emo kids does it take to change a lightbulb?
none they just sit in the dark and cry