Trump has threatened a tariff on goods from Canada if the country does not clamp down on immigration and the flow of drugs across its border with the U.S.

CBC News is learning new details about how Canada could retaliate if Donald Trump brings in 25-percent tariffs on Canadian imports to the U-S.Sources say Ottawa is working on a list of U-S products that could be hit with Canadian tariffs.

Trump alleged that Newsom's policies regarding water management and environmental conservation contributed to the ongoing crisis.

Trump has said he would turn on “a very large faucet” that could send millions of gallons of water from the Columbia River to Los Angeles.