I don't know much about him either. I don't think many people do so it's hard to imagine how she thinks this pick will help her...unless she is just assuming having and elderly white male is a benefit in some way.
I say elderly but he was born in 1964 so he is only 60. He looks a lot older than he is, at least in the pic above. His wikipedia page says he was in the national guard, was a teacher, and worked in manufacturing...at least he's not a career politician. He also voted against TARP and has in the past been a strong 2nd amendment supporter so it isn't all bad I suppose.