An IRS whistleblower who testified publicly about investigations into Hunter Biden’s taxes is expected to be promoted to IRS acting commissioner, two sources familiar with the plan tell The Associated Press.

The Trump administration’s move to classify thousands of living immigrants as dead and cancel their Social Security numbers is an escalation of the president’s crackdown on people who were legally allowed to live in the U.S. under programs instituted by his predecessor.

The Trump administration has moved to classify more than 6,000 living immigrants as dead.

The Internal Revenue Service’s acting commissioner is resigning over a deal to share immigrants’ tax data with Immigration and Customs Enforcement for the purpose of identifying and deporting people illegally in the U.S. Two people familiar with Melanie Krause’s decision confirmed the intended resignation to The Associated Press on condition of anonymity because they were not authorized to speak publicly about it.