FRANK PHIRI A former Malawian cabinet minister has been sentenced to six years in jail for corruption, the first conviction of a high-ranking official of the former administration since new President Lazarus Chakwera won office on an anti-graft campaign. Chakwera unseated former leader Peter Mutharika in a June 23 re-run election after the 2019 poll was overturned by a court due to irregularities. The re-run came after weeks of rare street protests against the ruling party over the elections and corruption accusations. The High Court in Lilongwe sentenced the former ruling Democratic Progressive Party's (DPP) powerful minister of home affairs…