In the intense race for Congress president, Digvijaya Singh today added a new twist by hinting at joining the contest alongside Ashok Gehlot and Shashi Tharoor. The Congress veteran also said Ashok Gehlot, a frontrunner for the top post, will have to "obviously quit" as Rajasthan Chief Minister if he takes charge. Digvijaya Singh spoke to NDTV in the setting of a brewing showdown between Ashok Gehlot and the man who could be his replacement as Rajasthan Chief Minister - his rival Sachin Pilot.