JOHANNESBURG – Former City of Johannesburg speaker Colleen Makhubele has joined the uMkhonto weSizwe Party.She was previously a member of the Congress of the People (COPE) before leaving to start her own party, the South African Rainbow Alliance (SARA).READ: Discussion | Why did Shivambu dump the EFF?Makhubele is joining a string of high-profile political figures who have crossed the floor to join the MK Party.In recent weeks, former Economic Freedom Fighters deputy president Floyd Shivambu announced he was joining the MK Party.