Here are some of the top national stories making headlines across the country. President Trump is imposing 50% tariffs on a range of Canadian goods, from hockey equipment to alcoholic beverages, further escalating the trade dispute between the United States and Canada. The new tariffs are expected to affect a variety of imported consumer products as trade tensions continue between the two countries. A highly anticipated preliminary hearing in the murder case against singer D4vd is scheduled to begin Tuesday in Los Angeles. The dayslong hearing is expected to mark the first time evidence and witness testimony are presented in court. D4vd, whose legal name is David Burke, was arrested in April following a monthslong investigation into the death of Celeste Rivas Hernandez. He has pleaded not guilty to charges including first-degree murder, sexual abuse of a child and unlawful mutilation of human remains. Voters in Arizona are heading to the polls Tuesday for the state's primary electio...