美国交通部长达菲：白宫已意识到美国在航空航天领域是净出口国，但他们正应对复杂的关税局势。

Core Insights - The White House has recognized that the United States is a net exporter in the aerospace sector [1] - The U.S. is currently facing a complex tariff situation that the administration is addressing [1] Industry Summary - The aerospace industry is highlighted as a significant area of export strength for the U.S. economy [1] - Ongoing tariff complexities may impact the competitiveness of U.S. aerospace exports [1]