It is interesting to note that two states with rougly the same population as DC have as much clout in the senate as, say Texas. One of them is supplying his party's front runner for president.
Sooner or later the Democrats are going to rally behind this issue. They have lost popular opinion on so many others, but voters think that they have learned the meaning of the word "disenfranchisement" and it is a cause they are willing to feel strongly about. 2004 is too late, but I predict that Senator Clinton will be giving speeches in front of angry crowds of the "unrepresented" in the coming 3+ years. The fact that none of these people pay taxes is a bonus. That makes them her peeps.