The Fulcher shift

A simple decision about running for one office as opposed to another one has upended the calculus for both, and maybe for much more of Idaho Republican politics.

The candidate in question, of course, is former state Senator Russ Fulcher, who for a long time has been a candidate for governor, then on Thursday shifted his aim over to the first congressional district, to run for the U.S. House seat now held by Raul Labrador.

It’s doubtless a rational end result of working through the political...