What term describes the phenomenon where a successful candidate helps to boost the electoral success of other candidates from the same party?

The term that describes the phenomenon where a successful candidate helps to boost the electoral success of other candidates from the same party is known as the coattails effect. This occurs when a popular candidate at the top of a ballot attracts voters who may also support other candidates from the same party down the ticket. Essentially, voters might be inclined to vote for these candidates because they are associated with a well-liked and victorious candidate, thus enhancing their chances of success in the election.

In many elections, particularly during presidential campaigns, the coattails effect can play a significant role. For instance, if a presidential candidate wins by a large margin, their party often sees more candidates in local and congressional races winning as well, benefiting from the overall popularity and engagement generated by the top-of-the-ticket candidate.