Probably. But just about everybody (even those who felt bullied themselves) can be accused of having bullied somebody in high school, especially at private schools like Andover. The bullying story sounds like another cheap shot from the Boston Globe.
FWIW, Bush and Bill Belichick graduated in the same class and one of them turned out okay (pending further review of Deflategate).
Actually, Belichick didn’t graduate from Andover. He went to Andover for a postgraduate year to improve his grades so that he could get into a quality college.
You need to stop getting your info from Slate.
Also, there are plenty of kids that have gone through Andover who weren’t bullies.