Zille, the former leader of the opposition, has been forced to apologize after tweeting that colonialism was not entirely bad.
Helen Zille tweeted that colonialism wasn't entirely bad and suggested she saw it as bringing some benefits.
The South African president said he "knows who is stealing" in his government.
Zuma has survived three motions since the start of 2015.
The Tshwane mayor has banned politicians from buying high-end vehicles and using blue lights to evade traffic.
Coalitions will need to be struck after the ANC's worst performance since 1994.
The African National Congress's showing is its worst since the end of apartheid.
The ANC is in danger of losing the dominance it has held since the end of apartheid.
The elections are being billed by the opposition as the country's most important ever.
Zuma may face the reinstatement of 783 corruption charges, but he's still popular with rural South Africans.
The South African president used state funds to make build himself a swimming pool and amphitheatre.
Every existing and new member of Maimane's party will have to sign an anti-racism pledge.
Newly elected opposition leader Mmusi Maimane says president must be held accountable for €19m home extension scandal