Tell me importance of federalism

Explanation:

    So Federalism provides a way for a little or many different groups of people in different parts of the country to live together.

   Federalism provides a lot of ways by which these different groups share power over common interests or ideas, but it also provides for these groups to have a level of autonomy, and vis-à-vis central state institutions.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.