Interesting turn of evens
Story here. Michael Sullivan was acting head of BATF under George Bush the younger, and gun groups opposed his being made permanent out of concerns that he might be anti-gun.
Since then, he's hired on as outside counsel to the National Shooting Sports Foundation, is now running for the Senate, and has said he'd have voted against the recent Senate gun bill. Since he's running in Massachusetts, that's unlikely to be meant just to garner votes. (He is running as a Republican, but still, we're talking Massachusetts).