How’s this for a scenario:
Obama is removed from office. Pelosi is ousted. While impeachment proceedings against Biden are moving forward, the Senate, seeing the writing on the wall, begins looking for a new President Pro Tem.
In the proverbial smoke-filled rooms, Blue Dogs and Republicans form a loose coalition, realizing that in this time of crisis they need to appear statesmanlike and bipartisan. They put their heads together to pick a President Pro Tem and future POTUS both sides can tolerate ...
Sen. John McCain, R-Arizona.
A real page-turner!
He’s not eligible, either, that ludicrous Senate Resolution 511 notwithstanding.
Actually, there's a good argument to be made that if Obama was never eligible (as opposed to becoming ineligible after the fact), then the election would have to be re-adjudicated by the House. With no (eligible) candidate now having received a majority of electoral votes, the Congress would be required to choose the President from one of the 5 top candidates receiving electoral votes -- a list of one: John McCain.
Since Biden was elected to his office by the EC on a separate ballot and is Constitutionally qualified, unless he is removed via impeachment, he would continue to be the Vice-President. Of course, if he's forced to resign or is impeached, then President McCain would choose a new Vice-President, subject to the approval of the Senate. I could easily see (especially in exchange for Congress to avoid a long, protected battle over the ongoing vacancy crisis) McCain agreeing to appoint a Democrat in a show of bipartisanship... and whom better than a high-profile Democrat who is currently in the Administration already... say, as Secretary of State...
Juan McCain is not NBC either and Senate resolution is going to change that. Besides, their resolutions do not carry weight of law.