Europe is buying billions of Russian gas and petrochemicals. https://energyandcleanair.org/financing-putins-war/ The first step when finding yourself in a hole is to stop digging.
Except they can't. Europe is struggling with soaring energy costs and a lack of alternatives. Whether it's red tape or unfortunate geography, Europe cannot afford to turn off the Russian gas tap. A benevolent US would see this and find ways to bridge the gap for Europe and lower its energy costs, further choking Russia. A less benevolent US would see this and encourage it to continue, weakening both parties and sowin…
LNG is a fungible commodity that is traded world-wide. Don't see much beyond symbolic value here in refusing it. Trying to enforce a price cap would be great there, but needs coordination.