Piety is the quality of being religious or reverent. According to Socrates the pious have the quality to be loved by all gods. The way to be loved by the gods is to do things or acts that the gods love or like. One of the things or acts can be praying or showing that one is devout or worships their gods.
In this article Obama shows that he pious even in the cruel rejecting of those who don’t like him. As is pointed out in a forthcoming book of essays* about world leaders and faith, George W. Bush did not mention the words “Jesus”, “Christ” or “Saviour” once during the eight National Prayer Breakfasts at which he presided. Compare that with the credal language of President Obama at the Easter Prayer Breakfast of 2013, when he described Jesus of Nazareth as “our Saviour, who suffered and died [and] was resurrected, both fully God and also a man.”
By Obama stating this he showed that he is pious even though even though he can be seen by some poeple as an untrustworthy politician. He also had this put on the Jerusalem Wall “Lord — Protect my family and me. Forgive me my sins, and help me guard against pride and despair. Give me the wisdom to do what is right and just. And make me an instrument of your will.
With that being said it is hard for someone to show that they are religious in the setting as a politician. Especially when one has to make decisions that everyone will not agree with. Examples include same-sex marriage, and stem-cell research. Furthermore, Obama showed his piousness when he did the things he did while no one was watching him.