If the vote was thrown to the House, could Pelosi decide NOT to have a vote, and make herself President ?
No. The Constitution states that each state shall vote by delegation. Rs have 26, Ds 24, and 1 in flux. Trump would be president.
Then, the Senate would vote for the Veep. It “seems” to say that this would be from among the next three highest vote getters-—i.e., Biteme and Jorgenson, but I think it also includes Pence. So Pence it would be.