Senators pressed Billy Long, the nominee for IRS commissioner, at his confirmation hearing Tuesday about what taxpayers should expect next from the agency.

Democrats on the committee were not convinced. “You expect us to believe that the money just fell out of the sky and it showed up in your campaign treasury?” said U.S. Sen. Ron Wyden, a Democrat from...

It comes as the agency has laid off thousands of workers, including nearly a third of its auditors.