The Obama administration has a final major reason to avoid effective sanctions. If someone had said a year ago that U.S.-Russian relations would reach the present point, they would have been laughed at, something I can attest to. Foreign investment is a major component of the U.S. economy, and distinguished political leaders are an excellent source of capital. If you are the leader of China, Saudi Arabia or India, all of which have problems with the United States that could conceivably mushroom, you might think twice before investing your money in the United States. And there are more countries than those four that have potential conflicts with the United States.
The U.S. sanctions strategy is therefore not designed to change Russian policies; it is designed to make it look like the United States is trying to change Russian policy.
Ain’t nobody goin to war over Ukraine, especially not NATO whose member states are by and large in the process of committing a self-inflicted societal genocide. They won’t defend themselves don’t expect them to defend anyone else.