Because Obama and Valerie KNOW that they are going to leave a MESS for the Donald to have to clean up!
If Trump wins and goes to the White House, the transition from one administration to another will be far more difficult than in 2001, when GWB got into office. Back then, the Clintons were only suspected of taking silverware, and removing all the W’s on the typewriter keys. Can you imagine how petty that is? Well, imagine a deliberate Sh*tpile of unnecessary problems ten times worse than that!
The best way for the Donald to clean up is to clean it all out. Top down, the Traitors either go voluntarily, or they will be criminally prosecuted for their treason. Obama will be appointed the head of the UN to prevent him from being arrested.