Ciattarelli Wins Mercer GOP Convention: 67-31% By Max Pizarro | March 15, 2017, 9:51 pm | in News Tonight, Assemblyman Jack Ciattarelli defeated LG Kim Guadagno for the Republican line in Mercer County. At the GOP convention, Ciattarelli collected 67% of the vote to Guadagno's 31%. Article Tags: Jack Ciattarelli Kim Guadagno LD16 Mercer County Mercer County Republicans Click here for the full Insider Index