Thanks y’all for the clarification. Now ‘splain to me the part where Piglosi gets to be prezzy... ;’}
Not possible.
The only way Pelosi gets to be President is if the President and Vice President are both incapacitated. It would have to happen very fast or there would be time for a new VP to be nominated after either the old one assumes the Presidency or was directly replaced. See how it happened during the Nixon administration.