A federal system of government is

A federal system of government is one that divides the powers of government between the national (federal) government and state and local governments.

Explanation:

The Constitution of the United States established the federal system, also known as federalism. ... Only the federal government can declare war.

not really sure i needed the points. sorry

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 lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.