A group of defiant US lawmakers will introduce a bill to impose more sanctions on Iran despite Washington\'s efforts to hold off new measures. Senate aides say a vote on the bipartisan plan is expected in January. The bill aims to target Iran\'s remaining oil exports and foreign exchange. The administration of President Barack Obama has been calling on lawmakers to delay any more sanctions as a diplomatic path with Tehran is pursued. Iran and the P5+1 group reached a nuclear deal in Geneva last month. Tehran agreed to limit its nuclear energy program in exchange for some sanctions relief. The sides have agreed to work to reach a comprehensive deal in six months. Tehran has warned that new US sanctions will kill the Geneva deal. Show Less >>