Probably just a bunch of bullshit falsehoods, look at the campaign against issue 1 in Ohio. It was a change to the state constitution to put a citizen run commission in place to draw maps for voting districts and Republicans ran a campaign that was just straight up lying about what the issue was about. Then even threw misleading ballot language on the ballot, I doubt anyone read the ballot language though because it was a small novel.
Not that it makes things better but that number is going to be bunches less than 15 million when everything is said and done. Trump is sitting about a 1 million down from his 2020 vote total and Harris is obviously like 11 million down from Biden’s 2020 total but California alone still has almost 7 million votes left to count last I looked and there’s still quite a few votes left to count across the rest of the states.