John magufuli, Tanzania's president, is known as "the Bulldozer". When he took office in 2015 the nickname was seen as a compliment: at last the East African country of 57m people had a leader who would take on graft and get things done. In his first months in charge Mr Magufuli wasted no time in cracking down on corruption (at least among his enemies). But since then the only things being squashed in Tanzania are civil liberties.
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