What types of restrictions were common in the one-party Democratic states like Texas?

In one-party Democratic states like Texas, restrictions on minority participation in primary elections were prevalent. This practice often involved creating barriers that effectively excluded minority groups and individuals who did not align with the Democratic Party from participating in the electoral process. Such exclusion often manifested in the form of closed primaries, where only registered members of the Democratic Party were allowed to vote in its primaries. This ensured that the party maintained tight control over candidate selection and reduced competition, thereby reinforcing Democratic dominance in state politics.

The other options do not capture the reality of the political landscape in one-party Democratic states. Open access for all parties is contrary to the practices that characterized such systems, where competition was often stifled. Proportional representation is a voting system that was not commonly utilized in favor of winner-take-all approaches in these states. Equal voting rights were also limited, as systemic inequalities often undermined the goal of ensuring that all citizens could participate fully in elections.