I've got work to do, so I'll throw it on, as boring as Trump is when he's not playing the room at a rally.
Thusfar in, he's claimed to have "lots of evidence, so much evidence" but it is thusfar looking to be the same shit: "theoretically this could be abused, thus this is evidence." His first gist seems to be essentially that the voter rolls are horribly curated and sending out a lot of ballots to these horribly curated rolls is rife for abuse (which, sure, is fair).
He then repeats the usual dumb argument: "I was winning so hard early, and then I wasn't winning hard" despite everyone having called that mail-ins would come in later in the day (in some cases they could not be counted until then), and that the mail-ins would favor the half-dead guy.
...so he's making a hearsay claim that many people have said "I went to vote, and I was told I couldn't vote because they already had a mail-in ballot, which I didn't send, and they weren't allowed to vote." Then he says they were allowed to make a provisionary vote, but that these votes weren't used. Despite the fact that part of signing the provisionary is to nullify the other one - so he's claiming, what, they voted for millions of people, then tossed out their provisionary votes, and no-one got any of this on video?