Final answer:
Coordinating media, including talk radio, is not a function served by a party caucus or conference. Their functions mainly include nominating party officers, reviewing committee assignments, and discussing party policy.
Step-by-step explanation:
The function that is NOT one of the multiple functions served by a party caucus (or conference) is D) Coordinating media, including talk radio. Party caucuses do serve to nominate or elect party officers, review committee assignments and discuss party policy. However, media coordination, especially in the context of talk radio, falls outside the typical activities of party caucuses. These activities are usually handled by party committees or campaign organizations dedicated to communications and media strategy.