The US government is able to enforce sanctions on other governments, crushing their economies and major businesses. It's able to acquire private property and businesses through eminent domain. "Good luck with that" is a bit shortsighted. The tools exist for the US to exert these forces, and they have been used successfully.
The US tends to treat its own companies with kid gloves and tends not to put the hammer down on billion dollar companies with their all important lobbyists.
The US government is able to enforce sanctions on other governments, crushing their economies and major businesses. It's able to acquire private property and businesses through eminent domain. "Good luck with that" is a bit shortsighted. The tools exist for the US to exert these forces, and they have been used successfully.