Remember when he accused New Hampshire of busing in voters? There was an analysis for how many buses it would take, a discussion of logistics for loading those buses, and the obviousness of tons of extra buses on the roads. Bottom line was anything of that magnitude would have been visible from space.
Similar situation here only much much bigger and across a number of states. It’s not just a few hanging chads we’re talking about, it’s millions of voters. And absolutely no plausible explanation of how that much fraud could have slipped past election protocols.
Side note: if he was really concerned about voter fraud, isn’t that something he could have been working on during his four years? Oh oops, I said that “work” word.