Here’s who’s backing whom in key O.C. congressional races

The Buzz is the Register’s weekly political news column.
With 31 challengers in Orange County’s four Republican congressional districts, major endorsements offer a measure of who’s off to a good start — and help distinguish candidates in the bewilderingly vast field.
Political scientists often emphasize that endorsements don’t decide a race, that they’re less important than the size of a candidate’s campaign treasury in helping connect with voters. But m