Nancy is teeing up the 25th Amendment. There is no way Chairman Joe will make it through a protracted speech standing at the podium without embarrassing himself in front of both houses and the nation. Pelosi knows this, as do Biden's handlers. Dr. Jill won't be able to stand next to him to work his brain, and the media will start to question his vigor and vitality.
This is Pelosi's way of calling out Biden and letting him know it's time to start making way for Kamala.