An early harvest deal with China that allows the U.S. to retain “leverage” would “bank progress” and build momentum toward a more comprehensive deal to come, a former top adviser to President Trump said this week, suggesting more broadly that limited deals can work in cases where broader pacts are initially unattainable. Clete Willems, who until March was the deputy assistant to the president for international economic affairs, is now a partner at Akin Gump Strauss Hauer & Feld LLP...