President Trump has always defied the laws of political gravity, seemingly impervious to setbacks that would sink any other figure and immune from the traditional ebb and flow of campaign cycles. 特朗普总统一向违背政治的引力法则，那些足以击垮任何其他政客的挫折似乎对他无效，而且他也不受传统竞选周期涨落的影响。 But…