If Trump's approval here is only ~33% and this remains about the same in 2018 and is relatively distributed across the country, the midterms will be a blood bath for the Republicans.
Stunning that Trump is only at 33% in a district that voted 4 points more Republican than the nation as a whole. Trump's deep unpopularity could cause a tsunami the nasty Republican gerrymanders could not have predicted in these wealthy suburbs. Places like suburban Philadelphia, Miami, Tampa Bay, Atlanta, Phoenix, Dallas, and Houston will be big pickup opportunities in 2018.