He's making a different claim, though. That million/billionaires can donate to politicians and influence the legislation they write. Or that they can donate to SuperPACs, which will air ads that change people's minds about what candidate to support. That seems pretty true.

Trump is suggesting that actual votes are being miscounted deliberately. That the entire voting system of the US cannot be trusted to provide the result the public give it. That's a very different charge, a very dangerous one, and utterly unproven.