NPR News Now covers the start of the midterm election season, noting Democrats' motivation to flip Congress amid Trump's unpopularity. The report details a lawsuit challenging the administration's effort to compile federal voter lists, which a judge previously blocked. It also highlights stalled US-Canada trade talks, with Canada imposing retaliatory tariffs, and ongoing shuttle diplomacy in Ukraine as fighting persists. Finally, the episode marks the end of summer with a look at a Los Angeles school's tradition of older students welcoming kindergartners.