Sam Waterston by Eric Liebowitz/NBC
has officially been "promoted" to New York District Attorney on
Law & Order
, as longtime prosecutor Jack McCoy fills the vacancy dictated by
possible presidential candidate
's exit from the role of Arthur Branch. Though he may, as a result, see less screen time, Waterson puts the best spin on the sitch, saying that while the career move is "a logical step" for McCoy, "politics isn't his game." As such, "There'll be fireworks," the actor predicts. "I'm looking forward to it."