A question for Barak and one for Hillary

Mr. Presdent, you pulled all of the troops from Iraq because you said you had promised that you would. This was a serious mistake. My question. Of all the many promises you have broken, why did you keep that one?  Hillary said that two years ago, when she was Secretary of State, that she would have handled Iraq differently. My question for Mrs. Clinton. WHAT DIFFERENCE DOES IT MAKE NOW?-------------Grandpa Gordon