Answer:
Selecting and supporting candidates who run for elected office
Explanation:
Political parties in the United States play a key role in selecting candidates and providing complete support for them to win an election. Before the primary caucus begins, political parties pre-select a number of important candidates which they believe can hold sway in the elections and win against the competition. Once a candidate runs for office, the political party provides monetary support as well as ensuring that the campaign runs smoothly.
