Interesting anon's tineye search shows the image used 32 times, also interesting is CNN..has many blank spots where it would have been used… None of these images on tineye show this little girl. There is an image with the little girl on Medium which is an opine from Obama:
https://medium.com/@BarackObama/how-to-make-this-moment-the-turning-point-for-real-change-9fa209806067
https://tineye.com/search/c0acd8194bd9f0f2e368b655b48770a9d22a1306