Two men vandalized a portrait of South African President Jacob Zuma with his genitals exposed on Tuesday, intensifying a heated debate about the picture that has enraged the ruling African National Congress. Television footage showed a white middle-aged man in a suit walking up to the portrait at a Johannesburg gallery and painting a red cross on the president's face and private parts. A younger black man then smeared black paint over the picture while the first man was being taken into custody by security guards. The picture of Zuma, called "The Spear", is reminiscent of a famous poster of communist revolutionary Vladimir Lenin, and is part of a wider exhibition addressing the perception of endemic corruption in Nelson Mandela's former liberation movement. In the red, black and yellow painting, the president is shown striking Lenin's heroic stance, but with his penis hanging out of his trousers.