Barvetta Singletary is a Special Assistant to Barak 0bama. 0bama recently lamented "my inability to pass gun control has been one of the great failures of my administration." A White House staffer was arrested Friday on charges of assault and reckless endangerment after allegedly threatening and shooting at a Capitol Hill police officer with whom she had been having sex, according to arrest records. Barvetta Singletary, a special assistant to the President and House legislative affairs liaison, has been placed on unpaid leave and had her access to the White House revoked, a White House spokesperson told CNN on Monday.