China's tariffs against U.S. agricultural products take effect amid a U.S.-China tariff war. President Donald Trump has targeted China with tariffs, blasting the country for involvement with fentanyl pouring into the US.

The Chinese government announced the tariffs last week, shortly after President Trump raised tariffs on Chinese products for the second time since he took office in January. The Chinese tariffs will include a levy of 15 percent on U.S. products like chicken, wheat and corn, as well as 10 percent on products like soybeans, pork, beef and fruit.

The Trump White House again said it would impose hefty tariffs on U.S. imports from Canada and Mexico, double current tariffs on Chinese imports, and consider new tariffs on other decades-long allies such as the 27-member European Union (EU).

President Donald Trump's tariffs on Canada and Mexico "are an attempt to stop the bleeding" in the U.S. economy, United Auto Workers President Shawn Fain said.

Canadians appeared to be abandoning road trips to the US amid President Donald Trump’s sovereignty and economic threats to their country.

The tariff and trade war heats up as President Donald Trump threatens to impose a new round off tariffs on Canadian goods, as soon as Monday.

President Donald Trump has threatened to impose yet another set of tariffs on Canada—the latest twist in a saga that has seen the president repeatedly institute and then delay sweeping taxes on close allies.