The articles raises the question of how global communicative strategies, which are created as a result of interaction of local strategies realized by different participants of socio-political discourse, both use and influence sociocultural knowledge such as values and party stereotypes. The research material is discussions of pro-Democratic and pro-Republican groups during primaries at the end of June - beginning of July, 2015. As a result of cognitive and discourse analysis of 2084 on-line comments in Washington Post, the article shows how politicians, journalists and commentators take into account each other’s strategies and build together attack and defense strategies for their own political group. The article emphasizes an active part played by ordinary discourse participants, which is an issue underestimated in many current critical discourse analysis works. It also touches upon the way roles are distributed among different participants and how these roles are verbally coordinated. Thus, this work contributes to the cognitive-communicative approach in linguistics and research of how certain mental representations get shared by members of a cultural and linguistic community.