He has also displayed a worrying, somewhat Clintonian slipperiness on difficult issues, both trivial (whether he would wear a flagpin) and significant (whether he would talk to rogue states).

• 他在一些有争议议题上的表现也让人担心，有点类似克林顿似的油滑，有小事（比如是否配带国徽），也有大事（是否与流氓国家对话）。