Catalan Solidarity (, SC) was a coalition of political parties in Catalonia formed after the 1905 áCu-Cut! incident and the approval of the 1906 Law of Jurisdictions. It was joined by the Republican Union of Nicolás Salmerón, leading to an internal rift within the party that would see Alejandro Lerroux's founding of the Radical Republican Party (PRR) in 1908.