Celebrity doctor and former Pennsylvania Senate candidate Mehmet Oz told senators he has the experience and reform ideas necessary to bring down the cost of health care and make Americans healthier in a hearing on Capitol Hill that showcased the former TV host’s penchant for charismatic salesmanship.

Dr. Mehmet Oz, President Donald Trump’s pick to lead the Centers for Medicare and Medicaid Services, will testify before the Senate Finance Committee on Friday morning

Mehmet Oz, known to most as Dr. Oz, is President Donald Trump's pick to run the Centers for Medicare & Medicaid Services.

Dr. Mehmet Oz, who is President Donald Trump’s nominee to lead the Centers for Medicare and Medicaid Services, may have “significantly underpaid his Social Security and Medicare taxes” in recent years,

Senate Finance Committee Democratic tax staff who reviewed Mehmet Oz’s tax returns said the nominee to run the Centers for Medicare and Medicaid Services avoided paying some Medicare and Social Security taxes over three years.

The memo created by Democratic staff on the Senate Finance Committee comes as Oz is expected to face the panel on Friday for a confirmation hearing.