the unitarian notion of accountability is, in general, very strange as it holds that a single election — the president’s reelect — is more democratically accountable than the rolling process of democratic assent produced by legislative elections and congressional oversight.

The theory of the unitary executive is that (1) the constitution requires it and (2) you get democratic accountability through presidential control through the power to remove agency heads. (1) is dubious (2) seems ridiculous at the present moment.