President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s eldest son directly participated in the search for his Interior secretary, Politico reported Wednesday.

Donald Trump Jr. sat in on interviews and made phone calls to potential candidates, the report said.

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His involvement comes as critics raise concerns about the links between the president-elect's incoming administration and his business empire.

Trump Jr. and his siblings are expected to remain heavily involved with the Trump Organization after their father's inauguration next month.

Donald Trump on Tuesday tapped Rep. Ryan Zinke (R-Mont.) to lead the Interior Department.

If confirmed by the Senate, Zinke would lead an agency with some 70,000 employees and a wide range of responsibilities, including enforcing treaties with American Indian tribes and studying U.S. geography.

Trump Jr. is an avid outdoorsman with a vocal interest in the Interior Department’s duties.

“The big joke at Christmas this year was the only job in government that I would want is with the Department of Interior,” he told outdoors publication Wide Open Spaces in November.

"I understand those issues. It’s something I’m passionate about. I will be the very loud voice about these issues in my father’s ear. No one gets it more than us.”