The President should not become such a rogue that he exploits the citizens for his own benefit.

SB 5.12.7 P Conversation Between Maharaja Rahugana and Jada Bharata  
King Rahugana was proud of being king, and he felt he had the right to control the citizens as he liked, but actually he was engaging men in carrying his palanquin without payment, and therefore he was causing them trouble without reason. Nonetheless, the King was thinking that he was the protector of the citizens. Actually the king should be the representative of the Supreme Personality of Godhead. For this reason he is called nara-devata, the Lord among human beings. However, when a king thinks that because he is the head of the state, he can utilize the citizens for his sense gratification, he is in error. Such an attitude is not appreciated by learned scholars. According to the Vedic principles, the king should be advised by learned sages, brahmanas and scholars, who advise him according to the injunctions given in the dharma-sastra. The duty of the king is to follow these instructions. Learned circles do not appreciate the king's utilizing public endeavor for his own benefit. His duty is to give protection to the citizens instead. The king should not become such a rogue that he exploits the citizens for his own benefit.