  This paper models legislative decision-making with an agenda setter who can
propose policies sequentially, tailoring each proposal to the status quo that
prevails after prior votes. Voters are sophisticated and the agenda setter
cannot commit to her future proposals. Nevertheless, the agenda setter obtains
her favorite outcome in every equilibrium regardless of the initial default
policy. Central to our results is a new condition on preferences,
manipulability, that holds in rich policy spaces, including spatial settings
and distribution problems. Our results overturn the conventional wisdom that
voter sophistication alone constrains an agenda setter's power.
