Hardtalk is in Cape Town to speak to Mmusi Maimane, who stood down last October as leader of the main opposition party, the Democratic Alliance. In his first major interview to an international broadcaster since he left the DA, Zeinab Badawi asks Mmusi Maimane what his resignation says about the state of politics in South Africa and his ambitions for the new Movement for One South Africa which he hopes will become a new political force in the country