A central claim about agricultural policy making is that it has been insulated from external pressures (‘compartmentalised)’ and from the influences of other policy concerns. This ‘compartmentalisation’ was embodied in a policy system that had its own actors and distinctive institutional structures, and also was reflected in the CAP. A central question in relation to the 2013 CAP reform is whether the inclusion of the European Parliament (EP) under the co-decision mechanism for the first time facilitated the inclusion of non-farming interests or reinforced compartmentalism, buttressing a ‘traditional’ conception of the CAP centred on agriculture and food production. The analysis focuses on the outcomes in relation to ‘greening’, market support, liberalisation, and de-coupling. From the perspective of the EP, key questions are whether non-agricultural interests were marginalised in terms of both discursive debates and policy action, and whether productionist discourses dominated other perspectives around the environment and sustainable food production?