Why has Obama recently been shown to be so happy?  Obama knows exactly what it means to have one's presidential agenda skewered by the judiciary, and by other similar forces of Washington.  Will the American pillar of its judiciary now be destroyed by Trump, or will Trump's Muslim ban remain in the ash-heap of failed presidential initiatives, finally signalling the "high water mark" of Trump's campaign of bullying and alternative-factism?  

I would guess that while alternative-factism and bullying may have played out well in the American electoral system, they may not be quite so effective within the American judicial system.