A dum question: if both candidates are unable to function, then what happens? (Trump for his crimes, Biden for getting dementia...)
Meanwhile in Finland: the Finnish version of "build the wall":
Parliament's Administrative Committee will not resume its discussion of the Refoulement Act until after the weekend. The committee is still so far behind schedule that it could not complete its work today.
The debate on the bill continued during the committee meeting, which started at 5 p.m. but ended quickly. Peltokangas says there was no drama at the meeting.
yle.fi
The bill needs 5/6 parliamentary approval and politicians are already sweating over it because it touches too many international treaties + constitution. Debate is mostly: is it ready yet? is it ready yet? is it ready yet? (While the committees checking the bill are getting more uneasy by the bill's content...)
If it's after they're elected then it'll run down the line of succession: VP, Speaker of the House, president pro tempore of the Senate, then the cabinet.
If it's before they're elected, I'm no expert but I believe the Democratic and Republican parties are private organizations that can do whatever the fuck they want, even fail to abide by the results of their own primaries.
As without a President we've no Vice President, the duty would fall to the Speaker of the House, then the president pro tempore of the Senate: the heads of our bicameral federal legislative branch. They'd serve the remaining portion on the term until the next regularly scheduled election.