It's possible they nominate Kelli, but he phrased this as the best-case scenario. Best-case means literally everything that has even a slight chance of going in Republicans favor goes in Republicans favor.
Yeah, I wasn't sure about AZ, but it's hard to see the Republicans holding the state given that it only went for Trump by 3. Also, McSally is incredibly overrated.
The man speaks the truth. The AZGOP is stuck between a rock and another rock when it comes to their three most high-profile candidates: Ward is a loon, McSally is a black hole where charisma goes to die, and Salmon is an asshole.