Moreover, the Constitution has been amended to give DC residents electoral votes for President. It could be amended again to give it representation in the House. That's the only fair way to do it. Mere acts of Congress don't trump the Constitution.
Exactly. I'm all for DC getting Congressman and Senators, but only by amending the Constitution. The Founders weren't infallible; they knew that some things would need to be changed, so that's why they included a process for doing so. We cannot ignore the Constitution, just because something isn't fair.