A unified North American trading powerhouse has long been seen as a potential bulwark against China. But Trump has repeatedly threatened to take over Canada and has targeted Mexico with some of his toughest tariffs. New Canadian Prime Minister Mark Carney has warned that his country’s traditional relationship with Washington is over.

On Tuesday, President Donald Trump bragged that many foreign leaders were “kissing his ass” to avoid the steep tariffs he’d imposed on their countries. But China’s leader, Xi Jinping, was not one of them. “We are waiting for their call,” Trump said of China’s leadership in a social-media post.

Beijing, which imports far fewer goods from the U.S. than it exports, is considering a range of nontariff measures amid growing trade tensions between the world’s two biggest economies.

China hiked its levies on imports of U.S. goods to 125% on Friday, hitting back at Donald Trump's decision to single out the world's No.2 economy for higher duties, while dismissing the U.S. president's tariff strategy as "a joke.

While U.S. President Donald Trump paused import taxes this week for other countries, he raised tariffs on China and they now total 145%. China has denounced the policy as “economic bullying” and promised countermeasures.

The U.S. and China have escalated trade war by raising tariffs even as Trump hit a pause on tariffs for other countries.

Trump says the US is "doing really well on our tariff policy", following fluctuations in global stock markets.

China says it is increasing tariffs from 84% to 125% on U.S. goods starting Saturday. President Trump this week had increased tariffs on China to 145%, escalating the trade war. CBS News' Weijia Jiang has the latest.

China’s president Xi Jinping says there are "no winners in a tariff war" as Beijing faces 145% levies on goods imported to the US.