Canada struck back at the United States on Tuesday with retaliatory tariffs on about $20 billion worth of American goods, including steel, dairy products, appliances and farm equipment, as the trade war between the once-friendly neighbors escalated sharply.

Canada will announce retaliatory tariffs against the United States on Tuesday, an official familiar with the plans told The Associated Press, escalating a trade fight that has sharply worsened since negotiations with the Trump administration collapsed.