If these girls make it, they'll be doing well. Being the daughter of a president and the granddaughter of another president isn't easy, not to speak of great granddaughter of Prescott Bush. Just look at Chelsea, or all those junior Kennedys.
Actually Margaret Truman made it--by becoming first an outspoken, independent woman, and then a successful writer of detective fiction.
I wouldn't be surprised if the Bush girls make it, after a certain amount of trying things out first.
I think most President's kids make it. I mean accept for that wacko Amy Carter and Ron Reagan, but to me everyone else seems ok. I think that the Kennedy kids (John and Caroline turned out well). Obviously the plane ride was not too smart, but otherwise he seemed decent enough. Chelsea I think had it harder than others because of her crazy parents and she seems adjusted. I think she might even become Republican someday when she goes through a rebellion stage which for some reason has not happend yet. She is one of the only President's Kids to not get into any trouble for alcohol or drugs...interesting.