Will Maryland Take Us Back?

James Joyner proposes yet another alternative to DC statehood:

The remaining part of DC was donated by Maryland.  Give it back to them, minus a carve-out for the White House, Capitol, Supreme Court, and Mall...If Maryland won’t have DC back, simply count DC residents as part of Maryland for the purposes of U.S. Senate representation and allow them to vote for Maryland’s two Senators.  Give them a House seat that’s counted as a “Maryland” seat but whose boundaries are fixed and excepted from the Baker v. Carr rule of equal size.  (This may require a Constitutional amendment but strikes me as within the spirit of the Constitution, since representation would still remain with states.)