Almost a week after Democrats swept the midterms with historic gains in Congress and downballot races, Donald Trump denied the legitimacy of election results across the country and resurrected old conspiracy theories about voting machines.

“Does anybody really believe that this ‘Election’ was honest,” Trump posted on social media Monday morning. “How could the Polls be so wrong??? Some early voting ‘dumps’ were so large that it was impossible to win, no matter how many people went to vote. It’s all about the machines, which are far more important than the voter!”

Democrats saw historic, sweeping gains across the country last week. They won the largest majority in decades in the U.S. House of Representatives, flipped party control of the U.S. Senate and clinched control of local governments in numerous states.