美国钢铁(X.N)盘前小幅走高，现涨0.76%，此前美国总统特朗普表示计划将钢铁和铝进口关税翻倍至50%。

Core Viewpoint - U.S. Steel (X.N) saw a slight pre-market increase, rising by 0.76%, following President Trump's announcement to double tariffs on steel and aluminum imports to 50% [1] Group 1 - U.S. Steel's stock performance reflects market reaction to tariff policy changes [1] - President Trump's proposed tariff increase is aimed at steel and aluminum imports [1]