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.

WASHINGTON (Reuters) -Dr. Mehmet Oz, the celebrity physician nominated by President Donald Trump to oversee Medicare and Medicaid, appears to have underpaid his social security and Medicare taxes in recent years, according to a memo drafted by Democratic staffers on the Senate Finance Committee.

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.

President Donald Trump on Thursday threatened a 200% tariff on European wine, champagne and spirits if the European goes forward with a planned tariff on American whiskey. The European tariff was expected to go into effect on April 1.

Ursula von der Leyen, president of the European Commission, said in a statement that the EU "must act to protect consumers and business."

Canada's new tariffs are in addition to its 25% counter tariffs on $30 billion Canadian of imports from the US that were put in place on 4 March in response to other Trump import taxes that he’s partially delayed by a month.

Increased tariffs on all U.S. steel and aluminium imports took effect on Wednesday, as Trump stepped up his campaign to reorder global trade in favour of the United States. Europe and Canada swiftly retaliated.