A participant-observer approach is utilized in a case study of Dallas, Texas, homeowners who organized to challenge city acquisition of their property for the expansion of the Fair Park State fairgrounds. From this study, a model of protest and political bias in urban politics is conceptualized. It is hypothesized that some individuals and groups are unable to place their demands, regardless of the extent of their organization and mobilization, on the governmental agenda. This inability to gain access to the decision-making arena is due to the existence of persistent and cumulative political biases. The biases are delineated as systemic, modes of operation, and ideological. Protest activity is a response by powerless groups to encountering these political biases.