We need a good Christian who actually practices and lives that Christianity. It should be someone of virtue to whom God has given the gifts of leadership.
Actually, what we "need" is someone who will stay out of our way and allow us to walk out our own faith without government persectuion, regulation, and confiscation. I am a thousand times more worried about what a President will do for that liberty than whatever his/her own personal walk entails. I trust God to handle that without my input.
Thus, we need to ASK God for that person.
Matthew 18:19 Again I say unto you, That if two of you shall agree on earth as touching any thing that they shall ask, it shall be done for them of my Father which is in heaven.
Matthew 21:22 And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.