Whoever wins is anointed by God, that's how we'll know.
I believe Cruz fears God. I believe Trump, Kasich, Clinton and Sanders do not. I could be wrong on any account but not likely.
The question is, do the American people fear God? I suspect probably not. In which case, who gets elected probably does not matter much. God always wins.
Psalm 2
1 Why do the heathen rage, and the people imagine a vain thing?
2 The kings of the earth set themselves, and the rulers take counsel together, against the Lord, and against his anointed, saying,
3 Let us break their bands asunder, and cast away their cords from us.
4 He that sitteth in the heavens shall laugh: the Lord shall have them in derision.
Dear God, look how great that God fearing Carter ended up being compared to that divorced Reagan.
Keep in mind God has used far less than perfect people.
Cruz has feet of clay.