Richard Cohen makes a good case for adding an amendment to the US constitution that wold prohibit children of presidents from running for the office themselves. "Now is the time for yet another amendment. This one would ensure that no child of a president could become president."
Cohen explains that Bush's reasons for invading Iraq are somewhat colored by his father's experience with the country. Given the magnitude of the decisions made by the chief executive of any government, its probably a good idea to keep family stuff out of the decision making process.