Wall Street JournalCitigroup CEO Vikram Pandit ResignsWall Street JournalBy DAVID ENRICH, GREGORY ZUCKERMAN and SAABIRA CHAUDHURI · Citigroup Inc. Chief Executive Vikram Pandit abruptly stepped down following a clash with the New York company's board over strategy and operating performance at businesses ...Citi's Pandit in shock resignation after board clashReutersCitigroup exit: Was it Pandit vs.