PBS News Hour S42 E144 July 20, 2017

Thursday on the NewsHour, President Trump goes public with regret over his choice for attorney general, while blasting the FBI and special counsel investigating Russia. Also: U.S. scraps a plan to arm Syrian rebels, how the Obama administration tried to safeguard state election systems, a crisis of war, cholera and famine in Yemen and Laura Poitras on her documentaries about Assange and Snowden.