The coattail effect is the tendency for a well known political party leader to draw votes for other candidates of the same party in an election. A leader of one political party who is receiving a vast amount of votes is often able to help attract votes for other candidates in the same party. | The coattail effect is the tendency for a well known political party leader to draw votes for other candidates of the same party in an election. A leader of one political party who is receiving a vast amount of votes is often able to help attract votes for other candidates in the same party. |