That’s because this summer an anonymous whistleblower approached the House committee to say its concerns had been justified. The whistleblower offered credible allegations of “evidence of possible misconduct,” specifically “inappropriate efforts to influence” the audit of the president, according to a letter Neal sent to the treasury secretary.

We don’t know the complaint details, including who allegedly meddled with the audit or how, and whether the IRS complied. The complaint hasn’t been released, and Neal said last week that he’s still consulting with congressional lawyers about whether to make it public.

But the exact details of the allegations matter less than the fact that they corroborate Democratic lawmakers’ argument that oversight of the IRS’s annual presidential audit is indeed a legitimate reason they — and hopefully, eventually, the public — should see Trump’s taxes. It’s hard to imagine how the federal judge in this case could now rule against the committee.