Friday on the NewsHour, a interview with a top State Department official who traveled to North Korea with Secretary Mike Pompeo. Also: President Trump's plan to curb the cost of prescription drugs, Iranians respond to the U.S. withdrawal from the…

Monday on the NewsHour, Rudy Giuliani says President Trump could defy the Mueller investigation. Also: Trump aides accused of trying to dig up dirt about Obama officials, setbacks for efforts in reconciliation in the Balkans, the science behind Hawaii's erupting…