The Supreme Court can change the definition of Election Day and whether mail-in ballots must be received by that date or simply postmarked by then. Whether that will impact the ongoing debacle in CA is uncertain but it will effect the future.
It was received by Election Day for eons, for all of US history, until the Democrats realized they could no longer win without cheating.
Soros made targeted investments in district attorneys, prosecutors, and Secretary of State, and his payoffs have been tremendous.
However, SCOTUS is sitting on a gamechanger, and the timing could not be more perfect, as the decision in Watson v. Republican National Committee is due soon, likely one of the next 3 Mondays.
States that currently count mail ballots received after Election Day (provided they were mailed or postmarked by Election Day) would have to stop doing so for races involving federal offices.
However, Alito could snake Roberts and issue a sweeping decision imposing the rule on ALL elections.