The idea that the political context sets the parameters within which political participation and mobilization occur is quite common among students of social movements and contentious politics (see Eisinger, 1973; Kriesi et al., 1995; McAdam, 1999; Tarrow, 1998; Tilly, 1978). This holds as well for the political activities carried out by migrants' organizations (Bloemraad, 2006; Vermeulen, 2006). However, previous work has stressed the impact of the institutionalized political system, largely overlooking more cultural and symbolic contextual aspects. In addition, previous work has looked at the role of political opportunities for explaining collective action, focusing much less on how they influence individual participation and behaviour (but see Leighley, 2001; Morales, 2009). This chapter engages with the systematic analysis of a set of ‘opportunity structures', ranging from institutional opportunities to discursive opportunities, for the political participation of migrants at the individual level. To what extent does the political context influence individual participation? If there is an impact, how can we disentangle the institutional from the discursive aspects of that context? What are the implications in terms of policy-making?