Where does Obama fall in the sequence of US presidents?
What is Obama's number in the order of US Presidents?
What ordinal number represents the position of Barack Obama in the succession of US presidents?
What's the chronological number of Obama as a president of America?
In the numerical listing of Presidents of the United States, what number was Obama?
How many presidencies preceded Obama?
Including Obama, how many presidencies have we had?
Which president count does Obama have?