Chuck Grassley demanding answers on security failures at Trump rally

Sen. Chuck Grassley, R-Iowa, previews his questions for the Secret Service acting director as the Senate investigates the assassination attempt and ‘communication breakdown.’Sen. Chuck Grassley, R-Iowa, previews his questions for the Secret Service acting director as the Senate investigates the assassination attempt and ‘communication breakdown.’ Read Moreaabbc405-4b7b-5826-b12f-9cb4b95b2659, fnc, Fox News, on_air, on_air|americas_newsroom, politics|senate, primary_politics, video The Latest & Breaking Videos on Fox News