Once you have relatives in a certain career, I can see how younger men in the same family would move that direction. He just needs to stay away from running for President, especially if he is just a younger Bush/McCain. Unless he takes a more conservative or libertarian view, the tea party types won't care for him much.
Were he in my district, I think I'd want to hear something about why he is running for office other than "Grandpa did it" or "I need a job".
(I noticed he is running for Land Commissioner so I guess he will be on my ballot.)