Many are saying that one hand does not look like the other.
The Super PAC Right to Rise Photoshopped Bush's picture against a Cedar Rapids stock image, and it appears to some that he has one black hand.
Many on social media speculated that Bush's head was cropped onto a black model.
However, Right to Rise's Paul Lindsay, showing the original photo on Twitter, indicated that the image shows a shadow over Bush's hand cast from a woman who stood beside him.
Mysterious hand revealed. Meant to use Valencia. Fail. Not deleting it from our servers. pic.twitter.com/sczIMf1REx— Paul Lindsay (@Paul_Lindsay) August 22, 2015