An influence-peddling scandal engulfing President Park Geun-hye has put the spotlight on the most powerful office in South Korea, rekindling interest in potential presidential candidates for next December's election.

Park, whose support rate is at an all-time low as she heads into her final year in office, apologized in a nationally televised address Tuesday, acknowledging that she consulted a friend on "certain documents" in the early part of her time in office.

Her remarks came a day after a cable TV station reported that her friend, a private citizen, edited some of her presidential speeches.