I haven’t been keeping score, but my sense has been that National Review stays out of Republican congressional primary races, at least most of the time. This is a good thing. It reflects an ethos focused on the strategic direction of the conservative movement rather than tactical politics. It underscores that issues are more critical to us than personalities. As a practical matter, moreover, it avoids diminishing the magazine’s prestige. A candidate who wins despite NR’s endorsement of his opponent could become hostile — and less open to our ideas — especially because he knows NR’s endorsement of the other...