Prosecution reform is exposing fault lines across the liberal camp as an unprecedented overhaul takes shape, splitting the camp over a cause that has united the bloc for decades. President Lee Jae Myung and the minor progressive Rebuilding Korea Party are locked in an unusually public confrontation over how far the overhaul should go, whether a career prosecutor should lead the new investigative agency and whether the reform can now be considered largely complete. Signs of friction had surfaced