Donald Trump is suggesting that broken voting machines are changing the results of the election even before polls close.
The Republican candidate for president has repeatedly suggested that he might not concede defeat if voting sees him lose out to Hillary Clinton.
And he has already tweeted to suggest that broken voting machines could be part of that rigging process, saying that problems with voting machines are being reported across the "entire country".
There have been reports of broken voting machines, which in some polling places have seen authorities switch to paper voting. Some have also suggested that voting machines are changing people's votes – which does appear to be true, but is unlikely to cause any significant change to the results.
Mr Trump has also said that he thinks that the polls are "purposely wrong", in a suggestion that he may claim that the results of the election are false.
The candidate has previously said he may not concede defeat in the election after complaining of a "rigged system", and later claimed he would accept the result if he won.
Mr Trump's son has said that his father will only accept the result of the election if he believes that the process was "legit and fair".
He told MSNBC: "All we've wanted is a fair fight.
"If he loses and it's legit and fair, and there's not obvious stuff out there - without question, yes."
