Answer:
constituent servant
Explanation:
Members of the Congress are composed of the members of the Senates and the House of Representatives. Each member are the representative of a particular constituency of States and addresses the constituencies problems and concerns.
The Congressmen primary duty is to make law for the country, help the concerning constituency, representing the constituency's people at the house and address to their problems.
Congressmen work for the betterment of their constituency which in turn works for the betterment of the whole country as a whole.
Thus the members of the congress plays an important role of "constituent servant" when they are at their home district.
Hence the answer is ---
constituent servant
