sentences:  By the time Tadakiyo became head of the "Rōjū" in 1666, most of the capable and stalwart politicians who might have opposed him, such as Matsudaira Nobutsuna had died.Abe Tadaaki remained as his only significant critic, until his death in 1671.Tadaaki constantly rebuked Tadakiyo for his poor sense of proper policy, and his laidback nature.