 In the Cape Colony, the SAP were proponents of a multiracial franchise, and its most prominent members were John Xavier Merriman and William Phillip Schreinier, whereas the Progressives led by Cecil Rhodes and Leander Starr Jameson were more firmly pro-British in orientation.In the Union, the SAP was a broad-based party committed to unity between Afrikaners and English-speakers, typified by its leaders Louis Botha and Jan Smuts.Its more pro-British tendencies provoked a reaction from Afrikaner nationalists who formed the National Party in 1914, led by J.