Lots of republicans no running for re-election.
54 and counting (both D and R).
Mostly R. But wait for Phase[2]! Then you will see Ds dropping.
Congress Swamp is draining.
ballotpedia.org/List_of_U.S._Congress_incumbents_who_are_not_running_for_re-election_in_2018?utm_source=ballotpedia&utm_medium=frontC&utm_campaign=51 United States representatives are not seeking re-election