Former President Donald Trump on Sunday mourned a former member of his administration who was gunned down last week during a carjacking in Washington, D.C. Mike Gill, 56, who served as the chief of staff for the Commodity Futures Trading Commission during Trump’s administration, died in a hospital on Saturday, several days after being shot as his car was stolen. Gill was waiting to pick up his wife near Mount Vernon Square in Washington around 5:45 p.m. last Monday when the gunman, Artell Cunningham, jumped into his car and shot him. Read: Florida Rep. Gaetz Cheers House GOP For Subpoena To Ge…