I think whether or not a particular leader (or anyone serving in any calling) is "called of God" depends largely on whether the person doing the calling is "inspired of God" and/or "acting for God" - and, frankly, whether there's a need for God to be involved to some degree, for some reason, in the calling. Those are two very subjective, difficult to determine criteria - so I don't spend a lot of emotional capital on trying to figure it out in most cases. I also think it doesn't matter much if someone is called of God if they wind up not "leading of God" or "being godly".
However, I have experienced
situations where I absolutely believe the calling was "of God" (meaning directed by God) - and,
interestingly, one of those cases was when the person turned down the
calling. He said he wasn't ready for such a calling but needed the
assurance that God knew his heart and was willing to answer a private
prayer asking to know if he could serve God in a formal calling if he
changed his life in the way he knew he should. I had struggled mightily
with trying to figure out who should be asked, and I questioned the
answer I got even more when I learned about the man's situation. I
didn't know him as anything but a name on a page, and what I heard about
him before our meeting didn't ease my concerns. When I left, however, I
was humbled that his name had jumped out at me so forcefully.
3 hours ago