PBS News Hour - Season 43 Episode 91 May 7, 2018
Overview: 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 volcano, the GOP primary in West Virginia and what being "educated" means to author Tara Westover.