What sanctions on Russia and China really mean (Escobar), page-6

"Thus we have US Interior Secretary Ryan Zinke threatening no less than a blockade of Russian energy flows: “The United States has that ability, with our Navy, to make sure the sea lanes are open, and, if necessary, to blockade … to make sure that their energy does not go to market.”

I guess Mr Zinke is allowed to dream but I'd like to see him try it. Cutting off Russia's energy exports would be an act of war against Russia.