Well perhaps you would still have Washington D.C. as its own entity with 3 electoral votes. Because while the 1968 rights resulted in the first real discussions about retroceding the area back to Maryland, it was the continued incompetence and corruption on levels not seen in the United States that allowed the Republicans to actually do it in 1995 with nary a complaint from Bill Clinton worried about his own reelection. Likely something worked out on home rule during the Reagan years, but no telling if that just would have led to the same results just 20 years later.