The winner is whoever gets the absolute majority of electoral votes. If electors from these states aren't allowed to vote then Trump STILL wins because he still has the majority of the electors that are voting. Period.
Actually (as usual) it depends on what the meaning of "is" is.
It's not a majority of the electors "voting", it's a majority of the electors "appointed".
A normal person would say that, since electors are appointed by State Legislatures and nobody else, that if the processes for appointment specified by Wisconsin, Michigan, and Pennsylvania do not run to completion that their designated electors have not been "appointed". That's certainly how I look at it.
But that's not the core of the David Boies-Al Gore argument, which we will soon be hearing again.
THAT argument is that the Democrat represents the General Will, and that too many voters "didn't understand" or "made mistakes" or "were intimidated", and that therefore, simple arithmetical counting of votes can't produce a just result.