By population it should be 4 electoral votes, especially as they pay 100% taxes. I am not sure what tax money you think they are sucking up. It is unlikely that Maryland will want retrocession or that 3/4ths of the State would approve statehood. Thus since all the DC taxpayers pay 100% taxes but only have 2 out of the 5 elected representatives that everyone else has, then just let them pay 2/5ths of the Federal tax. That would be fair.
What an ignorant statement. DC has a lower population than North Dakota, South Dakota, Montana, Alaska and Delaware, all of which have 3 electoral votes. And, yes, while they pay the same tax rate as the rest of the country which is presumably what you mean by paying 100% taxes, they also have, by far, the greatest ratio of federal dollars received per tax dollar contributed.
Nobody else is even in the same league.
As for me, I would be willing to contribute a dollar or three like the presidential election campaign check-off to the state of Maryland to approve DC's retrocession just so I wouldn't have to listen to any more whining.
They could just move back to The United States. DC has morphed into something that the founding fathers would be appalled at.