Independent DC journalist Andrew Leyden has reported the United States Secret Service has just shut down streets near Lafayette Park, the Ellipse, and Pennsylvania Avenue. Hazmat crews were also spotted inside the gate of the West Wing of the White House after they received reports of a suspicious substance being found. DC Hazmat crews tested the suspicious substance, and it reportedly tested positive for cocaine hydrochloride. LOOK: DC Fire Hazmat reports they have found a substance that tests positive for Cocaine Hydrochloride near the White House, which is a local anesthetic. Audio from @OpenMHz https://t.co/poI9vabqM7 — Andrew Leyden (@PenguinSix) July...