Depends on how they word it. Before the Republicans took control of the House in 1995, the delegates and the Resident Commissioner were part of the Committee of the Whole House where most business takes place. It would be constitutional to add Eleanor back to the Committee of the Whole House, but as a Representative, no way it passes constitutional muster given Article 1 section 2 "The House of Representatives shall be composed of Members chosen every second Year by the People of the several States," since D.C. is not a State, they cannot elect a Representative.
Yep, I had forgotten about the Committee. But we agree about the rest.