Who are the Hunter Biden IRS whistleblowers? Joseph Ziegler, Gary Shapley testify at investigation hearings

Washington — House Republicans summoned two IRS whistleblowers to testify publicly for the first time on Wednesday about their claims that the Justice Department limited a tax investigation into Hunter Biden, and their allegations that they were not free to pursue leads that may have implicated President Biden. 

Hunter Biden is set to plead guilty to misdemeanor tax charges next week as part of a plea deal. But whistleblowers Gary Shapley and Joseph Ziegler have both claimed the federal tax investigation into President Biden's son supported more serious charges.