President Trump has for months maintained that a phase-one trade deal with China, which he and other administration officials have touted as an historic achievement, will be followed by an even bigger deal covering more systemic Chinese economic practices. But on Wednesday, the president was asked if he would “cut another trade deal with Xi Jinping” if he is re-elected in November. “I will sort of hold that answer in abeyance,” he responded, repeating his oft-stated displeasure with China over...