What is the role of the vice president of the united states?

The role of the Vice President of the United States is The vice president is also an officer in the legislative branch, as president of the Senate. In this capacity, the vice president is empowered to preside over Senate deliberations, but may not vote except to cast a tie-breaking vote.

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an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.