JOHANNESBURG (AP) — South Africa faces an unusual national election this year, its seventh vote since transitioning from white minority rule to a democracy 30 years ago. Polls and analysts warn that for the first time, the ruling African National Congress party that has comfortably held power since Nelson Mandela became the country’s first Black president in 1994 might receive less than 50% of votes.

One big reason is Jacob Zuma, the former president and ANC leader who stepped down in disgrace in 2018 amid a swirl of corruption allegations but has emerged in recent months with a new political party. It intends to be a major election player as the former president seeks revenge against former longtime allies.

Here is what you need to know about the 82-year-old Zuma’s return to the political ring and how it might play a significant election role.