Senate candidate J.D. Vance’s vulnerabilities are now a matter of public record, thanks to the accidental publication of a group backing him.

The Trump-endorsed candidate employed a super PAC, Protect Ohio Values, to conduct research on his behalf, including compiling an opposition research file on Vance’s vulnerabilities. But the research file, among other documents related to Vance, was published to a public Medium page, inadvertently giving the public access to it, Politico wrote Thursday.