President Donald Trump on Saturday threatened duties of 30% on products from Mexico and the European Union, two of America’s biggest trading partners, in an ongoing tariff campaign that’s upended global trade since he retook office in January.

The moves come in the midst of an on-and-off Trump threat to impose tariffs on countries and right an imbalance in trade.

The deadline for the duties to go into effect are still three weeks, which may mean the announcements could be a negotiating move.