SEOUL - South Korean President Park Geun-hye's approval rating fell to 4 percent amid a deepening political crisis, marking an all-time low for any democratically elected leader in the country, according to a Gallup Korea poll released on Friday. Her approval rating slipped one percentage point from a week ago, while her disapproval rating rose three points to 93 percent, the poll showed. Park's presidency has been rocked by allegations that a close friend used her ties to the leader to meddle in state affairs and wield improper influence. Gallup Korea, based in Seoul, is not affiliated with U.S.-based Gallup, Inc.