LUANDA (Reuters) - Angolan President João Lourenço on Saturday took the helm of the ruling MPLA party, winning unopposed a leadership election that marks the end of Jose Eduardo dos Santos’ almost 40-year dominance of Angolan politics.

FILE PHOTO - Angolan President Joao Lourenco and German Chancellor Angela Merkel (unseen) attend a news conference at the chancellery in Berlin, Germany, August 22, 2018. REUTERS/Hannibal Hanschke

Although Lourenço replaced dos Santos as president last September, the latter remained head of the People’s Movement for the Liberation of Angola, a power split that some believe has slowed Lourenço’s reform agenda in a country where the separation between party and state has long been blurred.

Analysts expect that, with the party leadership in hand, Lourenço may look to shuffle his cabinet to further drive his anti-corruption campaign and economic reforms in Africa’s second largest crude producer, although who will be swapped or when remains uncertain.

Lourenço, who received 98.59 percent of the vote, vowed in his closing speech that members of the party would not be immune in his drive to stamp out graft.

“In this crusade (against corruption), the MPLA should take the lead, occupy the first trench, and be at the vanguard, even if the first to fall are party members or other leaders of the party,” he said to loud applause.

In his final speech as party president, dos Santos said he was leaving with his head held high, but admitted mistakes had been made.

“There is no human activity without errors, and I accept that I too made some,” he said.

Lourenço has removed dos Santos’ daughter Isabel as chair of the state oil company Sonangol and his son Jose Filomeno as head of the sovereign wealth fund. Jose Filomeno dos Santos has also been named as a suspect in a fraud investigation.

“There will be some changes, including at ministerial level, but I don’t expect it to happen overnight. I think Lourenço will go slowly,” economist Alves da Rocha said.

Lourenço faces numerous challenges. Angola’s economy has still not recovered from the oil price slump in 2014, with falling production eroding the benefit of higher prices.

The currency has fallen over 40 percent against the dollar since a dollar peg was abandoned in January, and attempts to diversify the economy away from oil are yet to show success.

Luanda has requested IMF help, totaling an expected $4.5 billion over three years.

“João Lourenço has all the power now,” wrote Jose Kaliengue in an editorial for the national daily O Pais. “But he’s also without excuses. And more exposed to critics.”