Jared Kushner has gone rogue. Donald Trump's senior White House adviser once again abandoned government normalities during an official state trip to Saudi Arabia, reportedly discussing US-Saudi cooperation with Crown Prince Mohammed bin Salman in a meeting that lacked representation from the US Embassy in Riyadh. The 38-year-old adviser also discussed the Israeli-Palestinian conflict and the US' economic investment in the Middle East with Saudi royalty, including King Salman, according to a White House readout from the trip. Naveed Jamali - a former US Defence Department intelligence officer and double agent - [said] the Trump administration has frequently "blurred the lines of communication" between government agencies by sending Mr Kushner to meet with top international officials. "We know there is a flawed system by the fact that Jared Kushner has a security clearance," Mr Jamali ... said on Thursday, noting the 38-year-old adviser's omission of Russian contacts from his initial clearance application and foreign business assets that would typically bar an official from receiving a clearance. Multiple sources from the US embassy in Riyadh have reportedly said they were not read into the details of Mr Kushner's Saudi Arabia visit, and have yet to receive any sort of briefing on the White House official's meetings with Saudi leadership. During his meetings with the Saudi crown prince, Mr Kushner seemingly failed to mention the high-profile killing of Jamal Khashoggi, a Washington Post journalist.