Solidarity is a South African trade union that negotiates on behalf of its members and attempts to protect workers' rights. Although the union is often involved in issues of political import, it does not align or formally affiliate itself with any political party. Solidarity is a trade union within the Christian tradition of unionism.

The Catholic Church and politics concerns the interplay of Catholicism with religious, and later secular, politics. The Catholic Church's views and teachings have evolved over its history and have at times been significant political influences within nations.