washington u.s. senator john mccain say monday personally back washington decades-old one china policy one leap conclusions president-elect donald trump would abandon respond every comment president-elect may reverse next day mccain tell reuters ask trump statement weekend unite state necessarily stick position taiwan part one china mccain say somebody hold china responsible behavior regard taiwan hong kong island build south china sea prop north korea trump draw angry response beijing comment well recent telephone call president taiwan exclusive n't 'leap conclusions trump drop 'one china policy mccain