washington u.s. secretary state rex tillerson speak saudi foreign minister adel al-jubeir situation saudi arabia u.s. state department spokeswoman say thursday crackdown corruption lead dozens arrest state department spokeswoman heather nauert also say u.s. charge affaires riyadh meet wednesday saad al-hariri resign lebanese prime minister saudi arabia ask report hariri hold kingdom nauert decline say meet take place elaborate hariri status describe talk sensitive private diplomatic conversations conversation tuesday jubeir nauert say tillerson urge saudi government conduct corruption prosecutions fair transparent manner saudi authorities arrest dozens royal family members officials businessmen anti-corruption crackdown begin saturday face charge range money-laundering extortion line public fund royal money always clear saudi arabia absolute monarchy rule islamic system law systematically codify elect parliament exist trump administration endorse purge cement dramatic strengthen relationship u.s. president donald trump part drive governments determination confront iran grow regional power many experts see crackdown move crown prince mohammad bin salman head new anti-corruption body amass power enact political economic social reform ensure succeed father king salman tillerson speak saudi counterpart arrest kingdom state department