The South African Communist Party has threatened to abandon Cyril Ramaphosa if he purses his plan to unbundle Eskom.
A spokesperson for the party warned that it would pull its support for the president if his reforms at the power utility only benefited a small group of "opportunists".
The SACP also said that the unbundling would lead to job losses and ultimately privatisation.
The SACP is one of the ANC's biggest allies, and the party played a pivotal role in ensuring Ramaphosa's victory at Nasrec in 2017.
The party's threats of abandoning Ramaphosa are the latest in a series of cracks which have begun to show in the ANC's alliances since Ramaphosa announced plans to overhaul Eskom.
COSATU also opposed the president's proposed restructuring of the power utility, and claimed, like the SACP, that it would lead to retrenchments. Even some figures within the ANC have reportedly spoken out against the proposals, saying that Ramaphosa was bending to the will of the World Bank.
Additionally, the SACP criticsed governmant's plans to buy electricity from independent power producers, according to City Press. Instead, the party says government should invest in energy renewal.
The SACP has also claimed that Ramaphosa is working too closely with certain business interests, which the party says will benefit from the changes at Eskom.
"There are new opportunists that have arisen on the basis of comrade Cyril becoming president, with business interests who also think now is their time to eat," said Solly Mapalia, the SACP's first deputy secretary general.
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