President Donald Trump was poised to impose 25% taxes on imports from Canada and Mexico Tuesday and to double to 20% his levies on Chinese products.

China has American agricultural exports in its cross hairs as it prepares countermeasures against fresh U.S. import tariffs, China's state-backed Global Times reported, raising the stakes in an escalating trade war between the world's top two economies.

The president took to his social media platform on Monday to talk vaguely about tariffs on imports of agricultural products.