Yes, give back the District of Columbia to Maryland.
The original boundaries of DC included land which was contributed by Virginia. That part was eventually given back to Virginia. So there is legal precendent for changing the borders of DC.
The same thing can happen here. Give DC back to Maryland, they get their congressional representation.
If DC was made part of VA or MD, it wouldn’t change the political balance of power. They’re already Blue States.
Democrats have no interest in it because it would maintain the status quo - which they’d like to change to their advantage.