TANZANIA’S main opposition party has revealed that its leader had been arrested with ten other party figures, in what it called proof that President Samia Suluhu Hassan was persisting with the authoritarianism of her late predecessor John Magufuli. The Chadema party said leader Freeman Mbowe and the others had been detained before dawn at a hotel in the lakeside city of Mwanza, where they had been planning to hold a meeting later on Wednesday to discuss proposals for a new constitution. The arrests followed the detention of dozens of other party members last week for holding a meeting without permission.…