With just days to go before his first — and likely only — debate against Vice President Kamala Harris, former President Donald Trump posted a warning on his social media site threatening to jail those “involved in unscrupulous behavior” this election, which he said would be under intense scrutiny.

“WHEN I WIN, those people that CHEATED will be prosecuted to the fullest extent of the Law, which will include long term prison sentences so that this Depravity of Justice does not happen again,” Trump wrote, again sowing doubt about the integrity of the election, even though cheating is incredibly rare.

“Please beware,” he went on, “that this legal exposure extends to Lawyers, Political Operatives, Donors, Illegal Voters, & Corrupt Election Officials. Those involved in unscrupulous behavior will be sought out, caught, and prosecuted at levels, unfortunately, never seen before in our Country.”