Some of the challenges are self-inflicted, but a fresh set of court rulings questioning the president’s authority to enact tariffs hangs over his trade agenda.

China and the United States are accusing each other of reneging on their tariff truce as tensions rise over rare earths exports, computer chips and student visas.

China said on Monday that U.S. President Donald Trump's accusations that Beijing had violated the consensus reached in Geneva trade talks were "groundless", and promised to take forceful measures to safeguard its interests.