Updated at 12:05 p.m. ET
Rep. Darrell Issa, R-Calif., announced he will not seek re-election Wednesday, adding to a record number of House Republicans heading for the exits ahead of the 2018 midterms — perhaps seeing the writing on the wall of a possible wave election for Democrats.
There are now 31 Republicans who will not seek re-election in November: 19 who are retiring outright and another 12 who are running for higher office. And that list is is expected to grow in the coming weeks.