SCOTUS won't, but voters will. You can't steal an election without at least some attempt at plausible deniability. Currently that's not available to Trump, or to SCOTUS.

In 2000 the result was ridiculously close, with less than 500 votes in a single state deciding the outcome of the entire election. And Bush had led in the polling in the run-up to the election.

The situation this year is very different. Trump can only win if he can find a legal pretext for manipulating the results in multiple states, most - possibly none - of which are likely to be very close.