New 25 percent tariffs on Mexico, Canada imports take effect along with doubling of duties on China goods to 20 percent.

Follow for live updates after President Trump’s tariffs on goods from Canada, Mexico and China went into effect, and for reaction from world leaders, companies and investors.

European and Asian shares were mostly lower Tuesday after a new round of tariffs imposed by U.S. President Donald Trump took effect. China hit back at Washington's move to raise tariffs by 20% across the board with higher duties of up to 15% on U.

President Donald Trump delivered on his threat to hit Canada and Mexico with sweeping import levies and doubled an existing charge on China, spurring swift reprisals that plunge the world economy into a deepening trade war.