1948: The Nationalist triumph in South Africa’s general election was an anomaly. General Smuts’s United Party and allies won 50.9 per cent of the total vote; D.F. Malan’s Herenigde Nasionale Party and allies managed only 41.2 per cent. The United Party, however, squandered too many votes on thumping majorities in urban constituencies, while the Nationalists performed strongly in rural seats whose smaller electorates required fewer votes to secure victory. When parliament reconvened, Smuts controlled 71 seats, but Malan controlled 79, sufficient for the Nationalists to usher in their policy of apartheid.
Source: Kenneth A. Heard, General Elections in South Africa 1943–1970 (1974), chap. 3