South Africa’s government was left trying to shore up credibility after President Jacob Zuma’s debacle over who should run the finance ministry called into question his ability to oversee the economy. Business leaders pressured senior members of the governing African National Congress into demanding that Zuma review his choice of finance chief, three people familiar with the situation said. Finance Minister Pravin Gordhan, who was reappointed to the job after his successor was suddenly fired last week, moved to reassure markets by saying the country’s limits on budget spending were “sacrosanct.” Zuma, 73, faces the greatest threat to the country’s stability since coming to power in 2009 after his decision last week to remove Nhlanhla Nene injected fresh turmoil to an economy that was already being imperiled by a slump in commodity prices.