Weegy: D. single-issue parties focus on certain beliefs, while ideological parties focus on one main concern. User: Why is an amicus curiae, or friend of the court brief, used by interest groups?
A. It is the main action that allows interest groups to create public policy.
B. It gives interest groups easy access to the President.
C. It is the way interest groups can influence the selection of federal judges.
D. It allows the interest ... (More)