The NRA's policy is to support the incumbent, even if their opposition is better regarding the 2A. Sad but true. They probably don't look at the whole picture regarding the way an incumbent conducts themselves during the whole of the session either and that is why politicians like Krebs can get away without standing up for the 2A 100% of the time. Anyone who will vote anti in the preliminary is not worthy of holding office, even if they vote otherwise in the final vote. This is the tactic that Krebs and her ilk are using. I called her out on it and her response was worthy of a spoiled child, not someone I want representing me! I saved those e-mails for future use.
Better the devil you know than the devil you don't know. Incumbents have a greater chance of being re-elected than a challenger does, this is true in primaries and general elections. The NRA is playing a numbers game with respect to supporting candidates for office.