It’s an odd and not at all common family situation: a former president weighs in on the presidency of his son. Meanwhile, it’s all made public just as another, younger son struggles to win the Republican presidential nomination. In a new biography, set to be released next week, former President George H.W. Bush sharply criticizes two key figures in former George W. Bush’s presidency: Vice President Dick Cheney and Secretary of Defense Donald Rumsfeld. Father Bush feels they did not serve his son well during a very difficult moment in his presidency, the 2003 U.S. invasion of Iraq. It feels a little like airing private family matters, or settling personal grudges. But as one columnist pointed out, the elder Bush was recording history as several U.S. presidents have already done. Either way, Rumsfeld punched back shortly after the biography was reported in the press. In an interview with NBC News, Rumsfeld told NBC News “Bush 41 is getting up in years…”