IRS whistleblowers will testify about alleged meddling in the Hunter Biden case at a House Oversight hearing, which Chair James Comer says will be "very substantive."

A senior FBI official has "100% confirmed" the IRS whistleblower's claims related to obstruction, Comer adds. pic.twitter.com/lus8qoITv3

— CBS News (@CBSNews) July 18, 2023