What I note is that Mannix jumped in after Erickson had spent 6 months campaigning (contributing to Hooley’s decision to retire) rather than campaigning for Erickson and building on Erickson’s efforts, which would have ensured and locked down the district for Republicans.
He’s only out for himself.
Well, you can make the argument. You might be right. I’d rather him have run for statewide office again (AG), but watching him get screwed out of it time and time again by the Democrat/Loonytarian cabal, I can hardly blame him for jumping into a race that he could win. McClintock did the same thing down in CA (and that in a district he doesn’t even reside in).