DJ Gribbin, left, President Trump's special assistant for infrastructure policy, is leaving the administration after a rough rollout of his proposals. Evan Vucci/AP hide caption toggle caption Evan Vucci/AP The Two-Way Trump's Infrastructure Strategist Is Leaving The White House April 4, 2018 DJ Gribbin, architect of the president's $1.5 trillion plan, "will be moving on to new opportunities," according to an administration official. The proposals received a cool reception in Congress.