If before the 20th then the electorial college votes for whoever they want to. IMHO
If it’s found that Obama is ineligible, then there will be a scramble between Biden, Hillary and possibly McCain for Obama’s delegates. Unless 270 of them go for the same candiate, then Congress will decide the election. Unfortunately for McCain, the Democrats control most state Congressional delegations, meaning he doesn’t have a chance.
After that then I think the Twentieth Amendment kicks in:
Section 3. If, at the time fixed for the beginning of the term of the President, the President elect shall have died, the Vice President elect shall become President. If a President shall not have been chosen before the time fixed for the beginning of his term, or if the President elect shall have failed to qualify, then the Vice President elect shall act as President until a President shall have qualified; and the Congress may by law provide for the case wherein neither a President elect nor a Vice President elect shall have qualified, declaring who shall then act as President, or the manner in which one who is to act shall be selected, and such person shall act accordingly until a President or Vice President shall have qualified.
So, the electoral voters would be democrat. Is this Hillary’s plan?