Obi told a crowd of supporters that yes, he has been stingy with public funds, and that made him a better fit for the country's top job.
Nigerians go to the polls on 25 February to choose a replacement for Muhammadu Buhari, whose eight year rule has been sharply criticised for failing to get to grips with rampant insecurity and a cost of living crisis.
A former state governor running for the Labour party, Obi is the first third-party candidate to present a real challenge to the dominance of the ruling All Progressives Congress (APC) and its main opposition, the People's Democratic Party (PDP), since the end of military dictatorship in 1999.
The 61-year-old has appealed to younger voters with a message that he wants to bring real change.
Denne historien er fra February 03, 2023-utgaven av The Guardian Weekly.
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Denne historien er fra February 03, 2023-utgaven av The Guardian Weekly.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Finn family murals
The optimism that runs through Finnish artist Tove Jansson's Moomin stories also appears in her public works, now on show in a Helsinki exhibition
I hoped Finland would be a progressive dream.I've had to think again Mike Watson
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A surplus of billionaires is destabilising our democracies Zoe Williams
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I see you
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Rumbled How Ali ran rings around apartheid, 50 years ago
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Trudeau faces 'iceberg revolt'as calls grow for PM to quit
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Lost Maya city revealed through laser mapping
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'A civil war' Gangs step up assault on capital
Armed fighters advance into neighbourhoods at the heart of Port-au-Prince as authorities try to restore order
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High emigration and youth unemployment levels belie the mountain nation's global reputation for cheeriness