Once the Spanish–American War came to an end in 1898, Puerto Rico became a territory of the United States.
At that point, the former Spanish colonial-era parties that existed in Puerto Rico were forced to redefine themselves given the new political reality created by the change in governments.
In 1924 Partido Republicano de Puerto Rico split into two factions: one faction joined with the pro-autonomy group Union Party to form the Alianza Puertorriqueña (The Alliance), and the other faction formed Partido Republicano Puro (Pure Republican Party) and joined with the Socialist Party to form the pro-statehood bloc called Coalición (The Coalition).
[6] The 1924 split brought Partido Republicano de Puerto Rico to an end.
[10] However, Partido Republicano Puertorriqueño has had an ideology of aligning itself with whichever national party would be the party victorious in the presidential elections and, with time, future U.S. Republican administrations showed little interest in Puerto Rico's local Partido Republicano Puertorriqueño.