Is Darrell Issa in trouble?

[Attorney General & PPT Dwarven Dragon]

Demographically speaking, it should be a good district for the GOP. Issa could be in trouble though because he is such a divisive figure. Ed Royce is the other congressman we should keep our eye on. He could get swept out in an anti-Trump landslide.

What about Valadao, Denham and Knight ?
(I honestly dont know anything about this state)

Denham and Knight might be in serious trouble, but Valadao looks fairly secure.

Yes the "Cook Political Report" just moved Knight's race to "Toss-up" so he is in some trouble.

Cook Political Report overuses the Toss-up rating. Take it with a grain of salt.

[Attorney General & PPT Dwarven Dragon]

I think we are reading too far into a low turnout R affair.

If it was just because of turnout issues, you'd expect Republicans to have done poorly across the board though. But that wasn't really the case. Denham and Royce performed very well, for example. It was pretty much just Issa who drastically underperformed (along with a few Democratic incumbents who overperformed)

Denham was under a majority. How is that overperforming?