What word, if any, best completes the analogy?
Example usage (feel free to fiddle with this context/setting as desired):
Behavior was unbecoming of all participants in last night's prime-time [Presidential] debate.
Neither candidate appeared presidential, nor did the moderator appear ___.
Edit to add second use, more meta:
The US election season will soon include Presidential debates (that might be describable by the sentences above). The English Language and Usage Stack Exchange is also holding an election for community moderators. If candidates in that election were to have a debate, it would not be a Presidential debate but a ____ debate.
Also, "governor" is to "gubernatorial" in the same way as the other pairs in this analogy.