"These tariff rates are pretty much set," Jamieson Greer said in an interview Friday with "Face the Nation with Margaret Brennan​."

New US tariff rates are "pretty much set" with little immediate room for negotiation, Donald Trump's trade advisor said in remarks aired Sunday, also defending the president's politically driven levie

The tariffs are a substantial new source of revenue for the federal government. The budget may start to depend on it.

The tariffs U.S. President Donald Trump imposed last week on scores of countries are likely to stay in place rather than be cut as part of continuing negotiations, Trade Representative Jamieson Greer said on Sunday.

U.S. President Donald Trump made a range of moves with tariffs as this week came to an end. Here’s a rundown of where his policies for import taxes stand as August gets going.

Trump signed an order imposing steep tariffs on 66 countries, the European Union, Taiwan and the Falkland Islands, to go into effect Aug. 7, after he originally threatened them for April but postponed twice after that until Aug.