I will used the words of Peter Marshall to pray for our new president on the day of his inauguration:
We pray, Lord Jesus, for our new President, Barack Obama. We are deeply concerned that he may know the will of God, and that he may have the spiritual courage and grace to follow it.
Deliver him, we pray, from all selfish consideration.
Lift him above the claims of politics.
Fill him with the Spirit of God that shall make him fearless to seek, to know, to do the right.
Save him from the friends who, in the name of politics or even friendship, would persuade him from that holy path.
Strengthen and empower his advisers. Bring them, too, to their knees in prayer. May their example and their influence spread, that we, in these United States, may yet have a government of men and women who know Thee, the Almighty God, as their Friend, and who place Thy will first in their lives as well as in their prayers.
Hear and answer, we pray Thee, forgiving us all our unworthiness; cleansing us from every ignoble thought and unworthy ambition that we may be renewed in spirit and mind and heart, through Jesus Christ, our Lord. Amen.