Does she just get to choose whoever she wants? Or is there an automatic elevation of the Speaker?
"Whenever there is a vacancy in the office of the Vice President, the President shall nominate a Vice President who shall take office upon confirmation by a majority vote of both Houses of Congress."
Yes, she picks whoever she wants, but the pick has to be confirmed by Congress.
Fun fact: Gerald Ford is the only person to have served as President who was never elected either as President OR as Vice President.