At first blush this l looks like a who-you-know decisions, but I am not so sure.
The basis for her asylum request hadn't been made public. People who seek asylum must show that they face persecution in their homeland on the basis of religion, race, nationality, political opinion or membership in a social group.
There may be a Barack Obama connection, but not the one that is obvious. If I were arguing her case, I would suggest that deporting her threatens national security, because it makes her vulnerable to kidnapping and subsequent blackmail of the president over the safety of his aunt.
I would not make a big deal about this decision on favoritism grounds.