Using the case of the anti-mining movement in El Salvador, this paper analyzes the ways in
which national level networks adapt and deploy resources mobilized through transnational
alliances in order to build a domestic resistance movement. It explores strategies and frames
through which local community groups, environmental rights organizations, epistemic allies, and
the Catholic Church leadership, each with their own set of interlinked transnational alliances,
stitched together a reform coalition that fueled national policy change. Using analysis that extends
beyond upward and downward scale shifts to include horizontal shifts in ideas and repertoires,
this work highlights the kinds of resources that local organizations extract from transnational
allies. It identifies different types of international nongovernmental organizations, including one
variation (the domesticating INGO) that is particularly well adapted for national level
collaboration. Arguing for the utility of a politically embedded campaign analysis, this study
explores the intersection between social movements and formal politics, giving special attention
to critical junctures when electoral calculations foster elite realignment and national policy
change.