The Dems did leave a door open to fair redistricting, but it involves other states. Not sure why what they do should affect Maryland doing the right thing, but there it is.
"Democratic leaders have rebuffed Hogan's attempt to change the way the state draws congressional boundaries, calling for instead a national shift where states dominated by Republicans and Democrats each changed how they drew boundaries. They have likened changing Maryland's system alone to unilateral disarmament.
Senate President Thomas V. Mike Miller and House Speaker Michael E. Busch issued a joint statement promising to pass what they called the Mid-Atlantic Regional Compact. If New York, New Jersey, Pennsylvania, Maryland, Virginia, and North Carolina all pass the same deal, the state's would each draw congressional districts using an independent commission.
The next redistricting process will take place after the 2020 census. Under the current system, General Assembly districts are drawn by the governor, and congressional districts are drawn by the General Assembly."