Yeah...this is humour. But it's exactly what's going to go down.
If Harris wins, Trump will call it illegal because she wasn't the original nominee. He'll take it all the way to the supreme court and they'll rule in his favour.
At that point, the people say you have one president. The supreme court will say you have a different president. So when the time comes to call in the national guard to protect the government...which one do they protect?
I hate to be the doom-crier in the room; but I seriously see this happening.