USTR Representative Jamison Greer (left) and U.S. Secretary of Commerce Howard Rutnick. Reuters Yonhap News An analysis has emerged that the power of U.S. Commerce Secretary Howard Rutnick, who was the 'key man' in last year's Korea-U.S. trade negotiations, is weakening, and that Jamison Greer, head of the Office of the Trade Representative (USTR), is taking control of the tariff and trade policies of the Donald Trump administration. The Wall Street Journal (WSJ) reported on the 28th (local time) that Secretary Rutnick's level of helper...