Clearly someone who understands the functional framework of representative government. It would make a lot more sense to target bureaucratic underlings who manage the various government institutions. That way, they could sabotage the government from the inside, hamstring the world powers and cause civil unrest and economic collapse. It'd be much easier then to impose their will upon less organized and ill-equipped sectarian forces.
I'm not saying it couldn't be done through the use of magic, I'm just saying that the Wizards do not have the know-how, wherewithal, or numbers to pull something like that off.