Voting, like life itself in South Africa, has long been divided along racial lines. The black majority mostly backs the African National Congress, which has ruled since the fall of apartheid in 1994, and most white voters choose the opposition Democratic Alliance, whose power is strongest in the white-majority state that includes Cape Town.
When South Africans vote tomorrow, polls show, those colour-coded patterns will remain mostly true: The ANC is widely expected to remain in power. But those same polls also show growing white support for the ANC, and growing black support for the DA and other parties, underlining a decline in traditional allegiances that could reshape a new generation of politics here.
"The broad frame is changing, and there's lots of flux, emotionally and intellectually, for all South Africans," said David Everatt, the head of the School of Governance at the University of the Witwatersrand, whom the ANC hired to lead its internal polling. "It is not a truism any more that South African elections are essentially a racial census."
A quarter century has passed since South Africa ended white-minority rule with its all-encompassing system of segregation and monopoly on force. But apartheid has survived both geographically and economically: South Africa is one of the world's most unequal societies.
White South Africans make up less than one-tenth of the population but own most of the country's land and control almost all its wealth. Less than half of the working-age black population is employed. The indelible apartheid-era patchwork of dense black "townships" and fenced-off white suburbs persists across the South African landscape. The country has the continent's most industrialised economy, but black South Africans live on the periphery of its main engines.