This is quite strange.

A Muslim should vote for a Muslim in such elections unless the Muslim candidate is not actually practicing and he is known to lie and do things worse than the non Muslim.

Therefore, answering such a question is not easy and one should look in the reasons and justifications for such an advice.

Please what category would you put a scolar who advice his fellow muslims to vote a khafir (unbeliver) as thier leader instead of voting a muslim as the leader.