U.S. President Donald Trump touted the relentless start to his term as evidence that "America is back" in a marathon speech to Congress. Canadian Prime Minister Justin Trudeau hits back against Trump’s "dumb" trade war, slapping retaliatory tariffs on American goods. And China unlocks fiscal stimulus to cushion the blow of the escalating trade war on its economy, which Beijing is determined to grow by another 5% this year. Sign up for the Reuters Econ World newsletter here. Listen to the Reuters Econ World podcast here. Find the Recommended Read here. Visit the Thomson Reuters Privacy Statement for information on our privacy and data protection practices. You may also visit megaphone.fm/adchoices to opt out of targeted advertising. Learn more about your ad choices. Visit megaphone.fm/adchoices