The New York Times: Reports on the results of US military support for Saudi Arabia, the article notes the following, " But that effort also has come with consequences, notably the resurgence of the Qaeda affiliate., which has exploited the mayhem exacerbated by the Saudi assault on the Houthis — foes of A.Q.A.P. — to take territory. "
Lets Get Real:
The US has removed its special forces from Yemen due to the fall of the Government, that Government is in effect exile needs Saudi Arabia to take action, the US drone strikes on Al Qaeda has ceased due to the fact that they no longer have a base in Yemen. The falling of Yemen in to civil war has helped Al Qaeda grow its influence and also gain land as noted above article. Thus the US has three points to consider when it comes to Yemen, 1, How far can the US push Iran in Yemen before Tehran calls the nuclear deal in to question, 2, How much support will Saudi Arabia need to take out the threat from Iran, 3, While the above two are going on the terror of Al Qaeda grows and becomes even more a threat to the West. There is no way the US would send troops in to Yemen, to many sides would like to take pot shots at any US forces, thus the Oval on the whole is following the right policy, support without getting burned.