Canada has struck back at the U.S. with retaliatory tariffs on more than $20 billion worth of American goods, including steel, dairy products, appliances and farm equipment, as the trade war between the once-friendly neighbors escalates. NewsNation's Cory Smith reports the latest from the White House. Start your day with "Morning in America," NewsNation's live three-hour national morning newscast hosted by Markie Martin. Weekdays starting at 6a/5C. #MorningInAmerica NewsNation is your source for fact-based, unbiased news for all Americans. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij