Follow Up on DC Voting Rights

Just got this in the mail:

With overwhelming support, the Third Committee of the Organization for Security and Co-operation in Europe (OSCE) Parliamentary Assembly passed a resolution that calls on the United States Congress to grant the residents of Washington, DC, equal voting rights in Congress in accordance with its OSCE human rights commitments. The United States is the only country in the OSCE where residents of the nation’s capital are denied full representation in the national legislature.

What does this mean practically speaking? I doubt that Denny Hastert and Bill Frist lose any sleep over an OSCE resolution.

Yet, it does keep the question visible: why doesn’t DC have the right to vote? It would appear on the surface it’s because the DC community would vote for Democrats. If that’s the case, I don’t see any way you could argue that this is consistent with democratic principles. I don’t see how you could see this as other than legalized voter suppression.