U.S. companies are bringing new trade lawsuits against their foreign competitors with a scope and frequency not seen in more than 15 years, government documents show, as a wave of new complaints builds under President Trump.

A Washington Post analysis of Commerce Department data found 23 new trade disputes initiated since January, making 2017 the busiest year for tariff cases since 2001. The new cases target trade between the U.S. and 29 counties, the most in any year since 2001. The cases include fights over Korean washing machines, Spanish olives, Chinese aluminum foil, Vietnamese tool chests, Argentine biodiesel and Canadian jetliners.

The U.S. trade warriors include financially strapped solar panel manufacturers, downsizing Rust Belt steel plants and declining California olive farms.