If the elections aren't legitimate then neither is the government that is "elected":
"...Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government..."
If you, I and the public in general knew for a fact the elections were not legitimate, what would we do? What could be done? A very interesting situation.