firehouse primary n. an electoral nominating process similar to a caucus, held in lieu of a primary election. (source: Double-Tongued Dictionary)
firehouse primary n.— «The nature of the caucus, or as it is sometimes call the “firehouse primary” because voting takes place in an open room rather than in a closed polling booth, requires more personal, diligent grass-roots...
firehouse primary n.— «In most caucuses, voters debate party platform resolutions, elect local party committee members and then divide into groups according to their Presidential preference. The only item on the Michigan caucus agenda...