With all the stories about the newly graduated Bush twins posing for fashion spreads and hitting the campaign trail with their father, I must say a few words about another president's child who seems to have grown up well: Ron Reagan. Granted, at 46, Reagan is more than twice the age of the Bush twins, and his father left office more than 15 years ago. But Reagan also seems to have finally come into his own. The beginnings were not auspicious. Twenty-two when his father took office in 1981, Ron Reagan was a lanky, awkward-looking ballet dancer, one of the...