The role that the US is playing in the Yemen is contemptible. That it can do so without real opposition is due in part to the fact that the Democrats initiated this war and, for favours, have handed over the people of Yemen to the Al Saud family to do with as they choose.
In doing so they are allied with Al Qaeda in the Arabian Peninsula- sworn enemies of the 'Houthis'- just as they are in Syria and Libya with any jihadist faction that will take their weapons and use them against nationalist and secular forces.
The United States has become a great and powerful empire but the minds that run it in both parties, are tiny.
China watches and waits as the USA reduces itself to the sum of its nuclear arsenal. Without which it is nothing. Nobody,least of all the American people, will mourn the inevitable end of a post WW II run which began badly and has been getting steadily worse.