visibility whip
 n.— «Eymann is the state delegation’s “visibility whip.” It’s her job to coordinate which slogans the delegates chant, or the signs that they hold up at the right moment. On Wednesday night, it was her job to make sure delegates held up large cardboard pictures of salmon, fir trees and wheat when it came time for the Oregon delegation to cast its votes to nominate President Clinton.» —“Week’s Worth of Politicking Just the Ticket for Delegate Couple” by Brad Cain AP Aug. 29, 1996. (source: Double-Tongued Dictionary)