Political discourse can provoke, preempt, or quell social movements, i
dentifying which issues are most accessible for challenge and how. Mov
ements are not simply reactive, however, and can affect public discour
se, forcing political leaders and established elites to respond to the
ir concerns. As a result public discourse may reflect the conflict bet
ween various actors, as challengers seek to redefine the issues of the
ir concerns and shape viable political solutions. Challengers offer al
ternative ''frames'' for ordering consideration of political issues, c
reating contests both between activists and mainstream media within ma
instream media. This article analyzes the ''framing'' of national secu
rity in elite discourse on nuclear weapons and the Soviet Union and it
s relationship to the broader political climate, including peace movem
ent activism. I compare specialized political discourse, expert strate
gic discourse, and scientific public discourse from 1945 to 1989. I id
entify three ''master frames'' regarding national security, then note
the relationships between frame contests in each venue and the larger
political climate. I conclude that specialized venues for public disco
urse serve as both a resource and a site of struggle for protest movem
ents, as elites both ''cue'' and respond to political movements.