When Donald Trump started the biggest trade war since the 1930s in his first term, his impulsive combination of threats and import taxes on U.S. trading partners created chaos, generated drama -- and drew criticism from mainstream economists who favor free trade.

Trump reiterated on the weekend he would impose 25% tariffs this week on goods from Mexico and Canada - including on vehicles made by General Motors and Volkswagen - but delayed a decision for a month after discussions with each country's leader.

President Donald Trump's tariff push is underway and a recent Fox News Poll shows that voters are skeptical of tariffs and a majority believe they will hurt the U.S. economy.