This is a circle jerk by the 'President Pelosi' crowd, they are realizing that they can't impeach Pence for nothing and make mumbles POTUS, so this is their mental masturbation about Pence stepping down.
The rest of the plan would then be to block the appointment of a new VP in the Senate and if Trump is removed by peach mint then mumbles becomes POTUS.
Anything to wield illegitimate power, fuck the voters and the will of the people.