Don Rumsfeld is a dead-ender. Not in the meaning of the phrase as we understood it in 2003, back when he prematurely described the Iraqi insurgents as mere "pockets of dead-enders." No, Rumsfeld is a dead-ender under the revised definition, provided by the former defense secretary in his score-settling memoir. In this telling, being a dead-ender means you are tough and formidable.