The left uses primaries. The right wastes them.

You can’t drain the swamp by refilling it with the same sorts of politicians backed by the same special-interest money driving the status quo. The leftist base learned that lesson for its own dangerous purposes this primary season. The conservative base, meanwhile, has somehow unlearned what it knew during the Tea Party years.

Liberal voters are knocking out very liberal Democrats for candidates even further left. Republican voters are not only keeping their moderates; they are knocking out some of the few members who actually fight for the party’s stated goals. What gives?

The left built a movement. The right built an industry. The results show.

There are only a few dozen full-spectrum conservatives among the 219 House Republicans who keep the pedal to the metal on immigration,