I expect 5-4 rulings deciding that partisan gerrymandering can't be ruled unconstitutional at the federal level, thanks to Mitch McConnell stealing a Supreme Court seat & Trump putting an attempted rapist on the court
The US Supreme Court doing whatever it can get away with to protect GOP gerrymandering is why state supreme courts are so critical. PA's Dem-majority Supreme Court struck down GOP gerrymandering in 2018, & NC's Dem court could do so too by 2020. Here's how dailykos.com/story/2018/11/…
This is sadly a prerequisite for getting the Roberts Court to actually put limits on congressional gerrymandering—If they only see it as something Republicans do, then they'll never do anything to stop it. This is why we must pass House Dems' #HR1 to ban gerrymandering nationally
Here's what North Carolina & Maryland may have looked like in 2018 without GOP & Dem congressional gerrymandering, respectively. NC Dems likely would've won 2-5 more seats, & MD Rs would have won just 1 more seat (they're only challenging 1 district). Stats for nonpartisan maps: 
Following the 2018 elections, Republicans are poised to draw four times more congressional districts than Dems after the 2020 census. This would likely still leave the GOP with a sizable edge stemming from gerrymandering, but Dems could still flip key legislative chambers by 2020
NEW: Here's my brief take on the Supreme Court's decision to hear appeals of two partisan gerrymandering cases this March concerning congressional maps from Maryland (Dems) & North Carolina (GOP). Things are looking quite ominous for foes of gerrymandering dailykos.com/stories/2019/1…
