America has a large number of active interest groups in the system of federalism because the group is allowed to participate and influence public policy by the Constitution.
Interest groups are groups who protect the interests of its member and attend to concerns that can influence public policy.
They are called the pressure/lobby groups because they exert pressure on government decision-makers.
Therefore, the United State has large number of active interest groups in the system of federalism because the group is allowed to participate and influence public policy by the Constitution
Learn more about Interest group here
brainly.com/question/9563066
