David Frum was never much of a thinker. Try as he might, he just can’t seem to attract interest, let alone a following, even when stabbing his old boss, President George W. Bush, in the back with a rambling screed. Profiting from a confidential relationship with a president is about as low as it gets. But Frum, the ex-speech-writer turned self-hating blogger, isn’t done descending. Now he spends his lonely days and nights at his keyboard trying to settle personal scores and demonizing those who dare to dismiss his ramblings as the work of an emotional wreck.