If it's in the public interest, and it's true, then it's news and should be published regardless of who came up with it or their possible motives are for doing so. The PDF link posted by moneycantbuy in this thread appears to be appropriately redacted, hiding personal information which isn't newsworthy such as his social security number and home address.. but even then, I just tried Googling "JD Vance home" and I get…
That's the problematic part. The factcheckers can just sit on something that doesn't help their cause and then attempt to deal with it years later.
E.g. https://www.snopes.com/fact-check/trump-very-fine-people/