I donít think for one minute that the US government is ignoring Putin and Russia - I just think that thereís not a lot they can do to influence Russiaís actions anymore. The cold war is over, the cash war is now being played out and the US is losing thanks to itĎs national debt which has been financed by the far and middle east and Russia.
Russia is unlikely to bring the EU to itís knees by cutting off the oil and gas supplies - that would be like shooting the goose thatís laying the golden eggs and could potentially damage Russiaís economy, perhaps irreparably. Russia could however bring the US to itís knees quite easily, and with much less risk, by offloading the $75 billion dollars worth of US securities they currently hold.
Dropping that financial bomb on the world currency market is a far more real threat than waving a few intercontinental ballistic missiles around that youíre never really going to use and the outcome could be far more devastating to the US.