WASHINGTON - The US State Department on Friday called 'troubling' Philippine President Rodrigo Duterte's comments likening himself to Adolf Hitler and saying he would be happy to exterminate 3 million drug users. 'America's ... partnership with the Philippines is ... based on a mutual foundation of shared values and that includes our shared belief in human rights and human dignity,' State Department spokesman Mark Toner said. 'President Duterte's comments are a significant departure from that tradition and we find them troubling.'