How so? US administrations (both D an R) have been pushing EU states to spend at least 2% GDP on defense, and everyone understands that a significant fraction of it must be purchased from the US.
What would the hit to the U.S. economy be if Europe turned into a Russo-Chinese protectorate? Besides, almost all NATO members have been doing exactly what the Americans have asked and increased their defense spending to 2% of GDP (a lot of that money flows in the U.S. economy through weapons purchases, thereby subsidising the U.S. economy)