![US Republican presidential candidate Jeb Bush speaks at a campaign stop in Davenport, Iowa on August 13, 2015.](/sites/default/files/multimedia_images_2015/2015-9-us-usp-jeb.jpg)
US Republican presidential candidate Jeb Bush speaks at a campaign stop in Davenport, Iowa on August 13, 2015.
© 2015 Reuters
US Republican presidential candidate Jeb Bush speaks at a campaign stop in Davenport, Iowa on August 13, 2015.