HARARE, Zimbabwe - Zimbabwe's main opposition leader returned home Saturday, vowing that he would not be "bulldozed" into joining a lopsided government of national unity.

Morgan Tsvangirai flew into Harare after two months abroad. He was due to hold talks with his Movement for Democratic Change on whether the party should pull out of the power-sharing agreement that was reached in September but never implemented.

Despite the power-sharing agreement, President Robert Mugabe's party has grabbed nearly all the key ministries, appointed provincial leaders and reappointed the Central Bank governor blamed for the country's dizzying inflation, officially put at 231 million per cent.

"I will not be bulldozed into joining this government, which does not reflect the interests of the people," Tsvangirai said in brief remarks at the airport. "I'm not going to betray them."

But he stressed that he was still committed to the power-sharing agreement.

"I hope that we find a political solution to save this country from total collapse," he said.

The presidents of South Africa and Mozambique, and mediator Thabo Mbeki, the former South African leader, travel to Harare Monday to try to resolve the impasse. There are growing concerns about the regional impact of Zimbabwe's meltdown.

More than 5 million people are likely to be dependent on food aid because of a series of disastrous harvests. The collapse in water treatment facilities has fueled a cholera epidemic that has so far killed more than 2,225, sickened 42,675 others and spread over the border into South Africa.