Interest groups send representatives to state capitals and to Washington, D. C. to put pressure on members of Congress and other POLICYMAKERS. They engage in an organized process of influencing legislation or policy called: LOBBYING

PRESSURING

CAMPAIGNING

GERRYMANDERING

As the formulation of the sentence itself states, it is about pressure.

Explanation:

The pressure is one of the mechanisms that stakeholders use to achieve their goals. The goals of these groups are different. They can be political, social, and economical. The list contains some other elements used by interest groups, such as the lobbying of political officials and the media. Also, interest groups make and organized campaigns to realize their interests.