Dave Wasserman @Redistrict
GOP open seats were a huge driver of Dem gains in '08. So far, 2018 GOP open seats on track to surpass. https://t.co/7YWR5YtmFb — PolitiTweet.org
Nate Cohn @Nate_Cohn
Telling chart from @donnermaps https://t.co/FWAdaEm76o https://t.co/sTc11YUpZU