I know- stupid question.
Obviously, the Trump campaign (like the Bush 2000 campaign, which even fought to exclude military votes for Gore in Florida while trying to include dubious votes for Bush) will argue that every absentee ballot for Joe Biden is fraudulent and manipulated, but every vote for Trump is genuine and should be counted. In other words, like everything else he says, it will be inconsistent, slanted, and for his own advantage.
The Republicans can't even come up with a consistent principle. (For example, 4 years ago, they argued that an outgoing president shouldn't get to fill a seat on the Supreme Court. Now, they can't fill the seat fast enough.) Basically, what I'm saying here is, they have no principles. Power is what they want, for the sake of being in power.
The way to beat their plans is to overwhelm them with so many Biden Votes that there’s little sense in fighting over the stragglers..
As for the supreme court, you’ve got it. The problem is, the supreme court does not represent the people of the nation - only the political Extremists having jammed them through.. In such a case, the people will demand a fix!
Trump will do or say absolutely anything that he feels will keep him in power.