She had to either jet home or otherwise spend some time dealing with the arrest of her son. ‘Track’ punched his girlfriend in the face and threatened suicide. Also got a weapons charge.
http://gawker.com/police-report-track-palin-punched-girlfriend-in-the-fa-1753916371
The other theory is her endorsement speech was so painful, the Trump campaign got the big hook out.
BOTH!!
I had to mute it as soon as she started off with that owl screech!