I think if Zaffy wants to place his hit on the other mafia team then we should let him. I doubt if he can place a hit for a teamate. Is he claiming to be the Don?
If the numbers are what they appear to be, most likely anyone that wyco investigates will come back mafia.
I think the president should wait until after nightfall and see who is left before converting anyone. This could be an atempt to have the president use his powers and then the Don hits them. I am unsure if I have even seen someone ask to be turned and I am unsure really how I feel about it or even trust it.
As far as I can tell, the president does not need to come out to use their power.
My suggestion is to wait and see what happens.