OTTAWA — Canada will hit back at U.S. President Donald Trump’s 25 percent global steel and aluminum duties with tariffs that target C$29.8 billion worth of American goods. “We will not stand idly by while our iconic steel and aluminum industries are being unfairly targeted,

He's been president of the United States for less than two months, but Donald Trump has already rolled out hefty import taxes on his biggest trading partners. Here's a timeline of the trade war that started during his first term in office.