Mbeki’s visit on Monday comes after President Robert Mugabe allocated a number of important ministries to his own party, angering the MDC.
"The visit provides a platform and opportunity for ZANU-PF to reverse its unilateral action," MDC spokesman Nelson Chamisa said.
"The ZANU-PF mindset is not consistent with power-sharing. It cannot be power-sharing when one party controls all key ministries."
Movement for Democratic Change leader Morgan Tsvangirai warned on Sunday that his party could walk away from a power-sharing deal he signed with Mugabe if the latest mediation effort failed to end a deadlock on how to divide key ministries.
Mbeki, who scored his biggest diplomatic coup last month when he nudged Zimbabwe’s bitter political rivals to sign a power-sharing deal, is expected in Harare later on Monday.
A government notice on Saturday showed Mugabe had allocated three key ministries to his ZANU-PF party, drawing fire from the opposition and threatening the fragile pact.
Mugabe handed his party the ministries of defence, home affairs — which is in charge of the police — and finance which will be strategic in reviving the collapsing economy.
But the official Herald newspaper has suggested that the finance post was the only outstanding issue.
Chamisa said there was no agreement on all powerful ministries, including, justice, foreign affairs, information and local government that overseas the running of councils.
Mbeki’s role was thrown into doubt after his ruling ANC forced him to resign.
Zimbabwe’s economy has continued to implode, with the number of people in need of food aid rising by the day, adding to the woes of a country suffering staggering inflation of 230 million percent, the highest in the world.
Tsvangirai said on Sunday he would continue negotiating to try to reach an agreement but added that the country’s 10 posts of provincial governors should be shared between ZANU-PF, a splinter MDC group and his party.
While the parties have been at loggerheads since the signing of the Sept. 15 pact on how to divide up 31 cabinet posts, this has angered Zimbabweans who had hoped the deal would bring an end to years of economic misery.
Under the deal, Mugabe — in power since Zimbabwe’s independence from Britain in 1980 — retains the presidency and chairs the cabinet. Tsvangirai, as prime minister, will head a council of ministers supervising the cabinet.
ZANU-PF will have 15 seats in the cabinet, Tsvangirai’s MDC 13 and a splinter MDC faction led by Arthur Mutambara three posts, giving the opposition a combined majority. Reuters