A letter from their father

Malia and Sasha Obama become the First Daughters this Tuesday, and their dad has written a letter to them (and us) about why he's doing this and what it means for their (and our) future:

I realized that my own life wouldn't count for much unless I was able to ensure that you had every opportunity for happiness and fulfillment in yours. In the end, girls, that's why I ran for President: because of what I want for you and for every child in this nation.