Overview: Friday on the NewsHour, the trade war between the U.S. and China escalates as both countries announce new tariffs. Plus: The state of the American economy, what’s at stake for Trump at the G-7 summit, devastating fires in the Amazon, the legacy of GOP donor David Koch, Shields and Ponnuru on politics, evaluating the success of global anti-poverty programs and Jeff Daniels as Atticus Finch.