Actor Isiah Whitlock Jr., known for his roles as Senator Clay Davis in "The Wire" and on "Veep," has died at age 71 in New York after a short illness. His manager confirmed the passing, with tributes pouring in from director Spike Lee and "The Wire" creator David Simon. Whitlock was celebrated for his memorable performances, distinctive voice, and iconic catchphrase "sheee-it," appearing in numerous films with Spike Lee and other notable projects throughout his decades-long career.