So, what would that be....aside from the obvious e.g. someone able to step in and become President? Let’s play HR consultant...
Complimentary KSAs:
Opposite personality type (Kasich, Carson)
Former legislator, preferably Congress, who knows how to get things done through the system
More detail oriented, less big picture (because Donald is ALL big picture)
Stengths in complementary areas (e.g. other than finance and economics)
EEO points:
Female
Non-white
Age < 50
Trump seems to be about relationships as well. Someone connected to the current Congress, but not compromised by it.