USAID humanitarian aid destined for Venezuela is displayed for the media at a warehouse next to the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Feb. 19, 2019. (AP Photo/Fernando Vergara, File)
WASHINGTON (AP) — At least 56 senior officials in the top U.S. aid and development agency were placed on leave Monday amid an investigation into an alleged effort to thwart President Donald Trump’s orders.