This document provides an overview of political parties and interest groups. It defines political parties as coalitions that recruit, nominate, and elect candidates to control government and implement their policies. It also discusses the variation within and between parties. Interest groups are defined as organizations that try to influence policy on issues that their members share a common interest in. The document outlines different types of interest groups and strategies they use like direct and indirect lobbying to influence government. It also lists some examples of types of interest groups organized around attributes like age, race, gender, and issues like the environment, consumer rights, and reproductive rights.