dar es salaam senior tanzanian politician quit rule party monday complain human right abuse weaken democracy east african nation move political analysts say could trigger wave defections opposition party since take office late 2015 president john magufuli introduce sweep reform include anti-corruption drive praise western donors administration also increasingly accuse opponents undermine democracy curb dissent stifle free speech include ban newspapers monday lazaro nyalandu serve cabinet minister member parliament rule chama cha mapinduzi ccm party 17 years say deeply concern human right abuse direction economy evident ccm lose way judge current political climate leadership economic trajectory tanzania nyalandu say statement decide resign position member ccm national executive committee leadership position party effective today nyalandu say also submit resignation member parliament veteran politician among dozen candidates seek rule party presidential nomination 2015 defeat magufuli bashiru ally dar es salaam-based political analyst say magufuli reform could prompt defections rule party say opposition poorly place benefit trend opposition party overly dependent personalities defect ccm tell reuters make temporary gain defections institutionalise lack mass grassroots mobilization strategies ccm power since tanzania gain independence britain 1961 see support among young urban voters decline previous elections opposition party fragment oust power analysts say senior tanzania rule party mp quit cite democracy concern