Yeah but Dems suck at midterms.
The current situation isn’t really business-as-usual, so that might change if the next couple of years are as awful as predicted. Keep in mind there are a lot of new voters who weren’t able to vote in the 2014 mid-term election who seem to be very politically-active now, and tend to vote Democrat. If that momentum lasts, then the result may surprise us.
Moreover, Brian Knight of Brown University writes about the “presidential penalty,” which has historically meant that the party of the sitting president will lose seats in the midterm elections. Pew writes that “since 1842, the President’s party has lost seats in 40 of 43 midterms–the exceptions being 1934, 1998 and 2002.” Including the 2014 midterms, that tally rises, as Democrats lost even more Senate seats.
http://www.dailywire.com/news/10898/2018-mid-terms-could-be-really-bad-democrats-lets-frank-camp