In the intense heat of the present, it is easy to forget even the relatively recent past, but it seems to me that this GOP primary season is more acrimonious than the past few, probably because the stakes are so high.

When I’ve noted that this is the most important presidential election of our lifetimes, a few excitability-resistant conservative friends have said, “They have been saying that about every election for more than a generation.” My response to that is: