"My mother was pretty tough," Bush answered.
Bush said while he also plans on touching on education during his convention speech, an issue his older brother took on while in office, one of his main focuses will be to shed a positive light on the 43rd president.
Because of Obama's recent attacks on the former Republican president, Bush said he felt "compelled" to drive home the point that his brother is a "person of courage and integrity."
"I'm going to start off with just a recognition that my brother is a person of courage and integrity and honor, and we need people like that in public life and I love him dearly," Bush said. "I'm biased about this."