There may be tarriffs put on those shipments, as was tated in the ZH article
https://www.zerohedge.com/commodities/kyle-bass-saudis-are-sending-us-50-million-barrel-oil-bomb
"The anger at the incoming Saudi "bomb" has spread all the way to Washington, and U.S. officials said in recent days that Washington is considering blocking Saudi shipments of crude oil, or putting tariffs on those shipments, adding to difficulties for the cargoes now on the water."