I didn't say they that....they would get involved, I said the US promised heavy sanctions, swift and heavy something Putin never had and took them sometime to start to move with some sanctions and Putin's still smiling, then the EU imposed some heavier ones and finally the US follow but still (in my opinion) not heavy enough
Mr Harrell, who sits on the National Security Council, said the United States was prepared, immediately after an invasion of Ukraine, to impose "crippling financial costs on major Russian financial institutions as well as to impose a range of quite sweeping export controls that will degrade Russian industrial capacity over the mid and long term."
https://www.abc.net.au/news/2022-01-29/us-threatens-russia-with-massive-sanctions-over-ukraine-crisis/100790222