(BEIJING) — China announced a list of U.S. goods including pork, apples and steel pipe on Friday on which it might raise tariffs in an escalating trade dispute with President Donald Trump. The Commerce Ministry called on Washington to negotiate a settlement to the conflict over higher U.S. import duties on steel and aluminum but set no deadline.Beijing’s move appeared to be a calculated step aimed at increasing domestic American pressure on Trump by making clear which exporters, especially farming areas that supported the president in the 2016 election, might be hurt. The dispute has weighed on global financial markets amid concern it could spiral into a damaging round of retaliatory import controls by governments worldwide. The higher American duties on aluminum and steel have little impact on China, which exports only a small amount of those products to the United States.