The___ theory of Representation views members of Congress as a messenger boy of their constituents

Delegate theory of representation

Explanation:

The delegate theory of presentation holds that a member of a representative body, like the Congress, is nothing more than the embodiment of his or her constituents, and for that reason, he or she does not have the right to express his or her own opinions, only the opinions of the constituents.

Under this theory, a congressperson should never fail to act according to the constituents' wishes, because doing otherwise would be illegitimate.