President Donald Trump's nominee to lead the agency overseeing Medicare should divest financial ties to healthcare and pharmaceutical companies that could benefit from his policy decisions, Democratic U.

Sen. Elizabeth Warren (D-Mass.) has written a letter to Mehmet Oz, asking him to make a series of commitments to avoid conflicts of interests ahead of his confirmation hearing Friday to lead the Centers for Medicare & Medicaid Services (CMS).

Trump’s allegiance to Oz was further emphasized on Tuesday when the president announced he was nominating Oz’s son-in-law, John Jovanovic, to head the Export-Import Bank of the United States.