When Congress creates an agency, it is clear that legislative design choices will affect the ability of Congress, the president, and interest groups to influence that agency. In debating the wisdom of omitting a bipartisanship requirement, for example, someone might point out that a president can more easily influence a multi-member agency when he can appoint members from any party (that is, his party) instead of having to appoint members from both parties. Alternately, opponents of the proposed agency’s mission might criticize the choice to have one person, rather than a group, run the agency because the resulting agency will be more dynamic and unfettered than an agency run by a group that must reach agreement before it can act. And yet ...