The Bible is shot through with examples of kings and leaders having their hearts changed by God. Ezra, Esther, Daniel, Joseph and many more are examples of this.
I have been convicted that I am not praying enough for President Obama. This presidency may be one of the most crucial ones in the history of our nation and there is much that needs to be decided. The decisions he and his people make today will effect our children and our grand children.
We are to pray for the authorities over us, whether we voted for them or not, as they are God's ordained authority over us. Pray for wisdom, discernment, health, a righteous world view, and that he would be bold, if God chooses to change his heart, because he has surrounded himself with many who will also need to have their hearts changed to rule righteously.
Not an easy command to follow, never the less, it is still a command.