The Senate seat opened up on the Coast by Senator Feinstein’s impending retirement would normally present both political parties with an enticing prospect in 2024. Yet the GOP looks likely to be shut out of the race due to California’s primary rules, described by NPR as a “free-for-all.” It’s called a “top two” or “jungle primary,” in which the two top vote-getters of either party advance to the general election. It’s a disaster for Republicans.