MDC-T leader Douglas Mwonzora has suffered a blow in Bulawayo after four members chosen as party candidates for the March 26 by-elections declined the offer and pledged their allegiance to a faction led by deputy president Thokozani Khupe. Dorcas Nyoni from ward 19 in Magwegwe, former councillor Sheilla Musonda and Annie Nyathi both from Makokoba…