Judging by the name of the poll this seems like an internal? The numbers seem legit but I won't be having any takeaways until a public poll confirms this
I don't think this is an internal. It is a GOP pollster, however.
I knew Mary Fallin was really unpopular - but what has she done to make herself so unpopular?
Severe budget problems, to the point of some schools not being able to afford 5 day weeks, Highway Patrol officiers needing mileage limits because the state couldn't afford paying for their gas, and other issues. Here's a good article on this:
https://www.npr.org/2018/02/08/584064306/tax-cuts-put-oklahoma-in-a-bind-now-gov-fallin-wants-to-raise-taxes