Madikizela is due to meet Willemse and the DA caucus in the Southern Cape town on Friday afternoon to discuss his concerns.
He says Willemse breached the party’s constitution last week by siding with the African National Congress (ANC) in a vote to oust former mayor, Eleanore Bouw-Spies.
Willemse also quit as speaker in the Eden District Municipality against the DA’s wishes. Madikizela says the party cannot allow its mayors to be elected in such a manner.
“The moment you allow that kind of behaviour to fester in the party, then you won’t be able to instill discipline because just now, another councillor will collude with the opposition and then be elected as a mayor. We can’t allow that.”