Mehmet Oz, President Donald Trump’s nominee to lead the Centers for Medicare and Medicaid Services, may have “significantly” underpaid Social Security and Medicare taxes in recent years, according to a memo by Democratic staff on the Senate Finance Committee seen by Bloomberg News.

Dr. Mehmet Oz, the celebrity physician nominated by President Donald Trump to oversee Medicare and Medicaid, appears to have underpaid his U.S. Social Security and Medicare taxes in recent years, according to a memo by Democratic staffers on the Senate Finance Committee.

As the Social Security Administration cuts staff, that could impact the agency's ability to pay millions of benefit checks each month, Democratic senators warn.