One of the most remarkable aspects of the 1992 Perot movement was its abili
ty to mobilize thousands of activist volunteers. We draw upon studies of pa
rticipation and the literature on third-party voting to suggest explanation
s for activist involvement for Perot. Our analysis makes use of a national
sample of potential activists who telephoned Perot's "volunteer hotline" ea
rly in the 1992 campaign, and the 1992 American National Election Study. As
the third-party literature leads us to expect, negative attitudes toward t
he institutions of government and the major party candidates (especially Ge
orge Bush) were significant in stimulating the initial contact with Perot's
organization. Active mobilization into the campaign among those who called
Perot headquarters depended largely on a positive view of Perot, support f
or some issues on the candidate's agenda, and experience participating in p
olitics prior to 1992. During the fall, however, the insurgency lost recrui
ts due to the increasingly partisan nature of the contest and concerns abou
t Perot's chances of winning. The general dynamic of declining support for
third-party candidates in the partisan fall campaign appears to hold in the
Perot case, although the decline in support among activists was nowhere ne
ar as dramatic as the decline in the general public.