Not going to happen.
Asking the GOP to create three more Democratic seats is about the least likely thing.
AK and HI were admitted together because they preserved the partisan balance.
DC does the opposite.
All it takes is Hillary’s loaded Supreme Court to will it, and DC and Puerto Rico become new permanent members of the Dem voting base.
You're conveniently forgetting something: it's not about Republican vs. Democrat, it's about the elite vs. the rest of us.
The Republican party showed us already that it was against us when they pushed Cruz, who is obviously ineligible, in preference to the outsider that is Trump. They've shown us by allowing the Affordable Care Act to stand when it would be the easiest thing in the world to get rid of (simply cite the Constitutional right
to the "privacy of medical files [from the government]" and how the ACA mandates access to those selfsame files; kick it to the Supreme Court and laugh maniacally as they decide which to get rid of), and then there's Benghazi, Fast & Furious, the Iran Deal (which is provably treason).
No, the Republicans have been aiding and abetting the evil we are seeing.
The whole reason DC was created in the first place was because they did not want the Capital to be part of a State...otherwise they would have just left it as part of Maryland. If they want to be a state, just give them back to Maryland.
As for their 3 electoral votes - they should actually be collectively assigned to “all non-State U.S. Territories” and not just DC...in exchange give their Delegate a vote in the House since they do pay taxes, but no Senate seats as they are not a State.