washington one donald trump possible pick secretary state say friday president-elect criticisms china phone call taiwan president could signal different relationship beijing tough line issue trade south china sea speech thursday iowa trump say unite state need improve relationship china criticize economic policies failure rein north korea call taiwanese president tsai ing-wen arrange week ago think certainly lay foundation different relationship china john bolton former u.s. ambassador unite nations president george w. bush tell fox business bolton hawkish conservative see among contenders trump secretary state say trump expect countries live commitments make issue trade chinese bolton say also highlight say china political military step make south china sea chinese province ask think trump remark statement intent open negotiate position bolton say think least may well could use taiwan relationship play performance south china sea think important mention see past 15 years china say helpful north korean nuclear weapons program fact do precious little say opinion article last january wall street journal bolton propose use degrees escalation taiwan could start receive taiwanese diplomats officially state department lead restore full diplomatic recognition pressure china step back pursuit territory east asia experts saw trump call tsai dec. first u.s. president-elect president taiwanese leader since president jimmy carter switch diplomatic recognition china taiwan 1979 open salvo risky test will beijing however trump follow say would nominate iowa governor terry branstad long-standing friend beijing next u.s. ambassador china move country state news agency say positive sign tie bolton say trump move could signal 'different tough china line