If after soul searching, the Democrats can not get Biden to step down, than they need to team up with Republicans to impeach him.
Let say by some miracle he wins the election, there is going to be a bloodless/bloody Second American revolution as the Repubican are threatening to do. Things are going to be moving fast and you are going to need the mental clarity to deal with this domestic threat. Biden could have taken the lead during this transitionary period on January 6th to publicly call for military presence around the Capitol. However, Biden is dealing with this brain fog and could not recognize the threat at all.
I am sorry Kamala Harris is not the person to deal with this threat, you are going to need somebody else ready.
Protest near the Capitol during while they are counting electoral votes and Trump disputing the results. Biden is brain fogging it doing nothing.
This could be Robert Mugabe/Biden half asleep while a coup attempt just pops out of nowhere, the debate is a test of his ability to react quickly. His old age around age 90 projected weakness to his military and they went in on him. Except here it won't be his selected military leaders, it will be a right wing coup attempt to implement Project 2025 and end illegal discrimination against whites.
The Boeing crashes and Key Bridge collapse are just a taste of what is to come, they have covered this up as unfortunate accidents.