The new levies on cars and light trucks will take effect on April 3, the day after Trump plans to announce reciprocal tariffs aimed at the countries responsible for the bulk of the U.S. trade deficit.

Since U.S. President Donald Trump first threatened to place massive tariffs on Canadian goods, the country has been embroiled in a whirlwind back and forth with its biggest trading partner. Here's a quick look at how tariffs are set under normal circumstances.

Long-threatened tariffs from U.S. President Donald Trump have plunged the country into a global trade war — all while on-again, off-again new levies further escalate uncertainty.