election campaign 1 [vynechat] party systems 1 [vynechat] polarization (sociology) 1 [vynechat] polarizácia (sociológia) 1 [vynechat] political parties 1 [vynechat] political science research 1 [vynechat] politické strany 1 [vynechat] politologický výskum 1 [vynechat] stranícke systémy 1 [vynechat] volebná kampaň 1 [vynechat]