Which aspect of u. s. politics is most closely tied to the concept of direct democracy?

Voting

Explanation:

Voting is one of the aspects of U.S. politics that is most closely tied to the concept of direct democracy. Direct democracy occurs when the citizens of a place directly vote on the policies that they want to see enacted, without the use of representatives. Although this does not usually take place in the United States, voting is still an intrinsic part of the American model of democracy.