NPR News Now covers the collapse of U.S.-Canada trade talks, resulting in 50% tariffs on Canadian goods and planned retaliatory measures. A federal judge struck down a Trump administration visa ban for citizens of 75 countries as discriminatory. The broadcast also reports on President Trump’s involvement in a Washington IndyCar race, rising gas prices, and heavy rainfall in Hawaii. Additionally, nurses highlight workplace violence risks, and a Texas judge denied a new trial for a student convicted of murder.