Final answer:
Political parties are groups of people who work together to create and implement policies, place candidates in office, guide legislation, and coordinate campaigns and mobilize voters.
Step-by-step explanation:
Political parties are groups of people with similar interests who work together to create and implement policies. They seek to place candidates in office under their label and gain control over the government by winning elections. Party platforms guide members of Congress in drafting legislation, guide proposed laws through Congress, and inform party members how they should vote on important issues. Political parties also nominate candidates to run for state government, Congress, and the presidency, and coordinate political campaigns and mobilize voters.