He pours contempt on princes, and causes them to wander in the wilderness where there is no way – Psalm 107:40
In the Book of Daniel, the king of Babylon is an example of a ruler that felt he was invincible. He thought he could do whatever he wanted because Babylonia was the pre-eminent kingdom of the world. Yet, the kingdom was stripped away from him, and he ended up roaming around in the wilderness as a mad man. This tells us that no matter how powerful a leader or ruler becomes, he or she is no equal to God. God can raise up one king and pull down the same king. King Saul of Israel is a great example of this: God choose him for Israel when they asked for a king, but then he cast him down and selected the boy David instead of him. Though Saul continued to rule for many years Davids selection, it was only a matter of time before his lineage would be cut off from the kinghood. When any ruler becomes too prideful and think himself or herself as bigger than God, then God takes action to cast the ruler down. God will not let those who do evil rule forever. Take solace in this if your nation is being ruled by evil men.
God watches the actions of rulers and removes them in the passing of time