PBS News Hour S43 E98 May 16, 2018

Wednesday on the NewsHour, the North Korean regime cancels talks with the South and says it will reconsider a historic summit with the U.S. Also: Key takeaways from a slew of documents released in the Russia probe, on the ground in war-torn Yemen, voters in four states pick midterm candidates, how Facebook tries to tackle the content it won't delete and more.