South Africa’s ruling coalition, made up primarily of the African National Congress and the Democratic Alliance, is showing signs of a possible crack in its government of national unity.

Africa's largest economy has faced a burgeoning debt and stagnating economy that threaten to derail the country's coalition government.

South Africa's national budget was postponed on Wednesday because the two biggest parties in the ruling coalition disagreed over raising value-added tax, an unprecedented delay that caused the rand and government bonds to fall.

The South African government's annual presentation of its budget was abruptly canceled Wednesday and rescheduled for next month over a dispute among parties in the governing coalition.