He has vowed to continue his legal fight and his party is still campaigning for the election in two weeks’ time
Mpina filed an appeal last month against his removal from the race by the Independent National Electoral Commission
Government critics abducted, the main opposition leader detained and the presidential candidate for the second largest opposition party disqualified indicate a government crackdown before the election
In recent months, there has been a spate of abductions, assaults, arrests and murders, the victims all being opponents or critics of President Samia Suluhu Hassan’s government
Opposition leaders find it hard to fight dictators from abroad, but may place their families in danger when returning home
Tanzania’s opposition leader, who is again in exile, says ‘instead of telling people to vote, we should be telling them to prepare for popular revolt
Sixteen bullets and 27 operations later, Tanzania’s main opposition leader has recovered from a brutal assassination attempt – and is now in the middle of an even bigger fight
Having missed the chance to form a coalition, a so-called ‘endorsement’ may be the next-best step
The Ugandan opposition leader believes he is best-placed to lead an opposition coalition