DC doesn't have any Senators and only one non-voting Delegate to the HoR. They do have one EV.
I'm sorry, sir; I didn't explain it well enough.
If the District of Columbia were to be granted statehood, it would have two U.S. Senators and one congressman.
That's why the Democrats want it to become a state. They
really want this to happen.
By gluing it on to Maryland, Maryland would probably gain an extra congressional seat, but that's a cheap price to pay for avoiding the addition of two U.S. Senators.
But the District of Columbia has three, not one, electoral votes; this would also subtract two guaranteed Democrat electoral votes.
That's why it's urgent to as soon as possible slap all non-federal property in Washington, D.C., onto Maryland, so it can't become a state. If we don't get that done in my lifetime, I'm sure the Democrats will finally add it as the 51st state, with two sure new (D) senators and one sure new (D) congressman.