As Donald Trump refuses to concede the election, some of his most loyal allies have become obsessed with a bizarre new conspiracy theory about the race, insisting that Trump only lost the election because a deep-state supercomputer named “Hammer” and a computer program named “Scorecard” were used to change the ballot count.

The head of the U.S. Cybersecurity and Infrastructure Security Agency has called the claim about supercomputer election fraud “nonsense,” and urged Americans not to promote it…

The election fraud claims center on Dennis Montgomery, a former intelligence contractor and self-proclaimed whistleblower who claims to have created the “Hammer” supercomputer and the “Scorecard” software some Trump fans believe was used to change the votes…

What Trump allies tend to leave out, however, is that Montgomery has a long history of making outlandish claims that fail to come true. As an intelligence contractor at the height of the War on Terror, Montgomery was behind what’s been called “one of the most elaborate and dangerous hoaxes in American history,” churning out allegedly fictitious data that once prompted the Bush administration to consider shooting down airplanes.