President Evo Morales easily won re-election, according to unofficial results, getting an overwhelming mandate for further revolutionary change on behalf of Bolivia's long-suppressed indigenous majority.

Morales' allies also won a convincing majority in both houses of Congress in Sunday's election.

Opponents say they fear the coca-growers' union leader union will use his consolidated power not just to continue reversing racially based inequalities but also to trample human rights and deepen state influence over the economy.

Unofficial counts of 98 percent of the vote by two polling firms said Bolivia's first indigenous president won with 63 percent of the ballots _ 36 points ahead of his closest challenger in a field of nine candidates.

Jubilant supporters waving Bolivian flags jumped up and down in La Paz's central Murillo square after polls closed, chanting "Evo! Evo!"

Manfred Reyes, a center-right former state governor and military officer, conceded soon after. He won 27 percent of the vote, according to the unofficial tallies.

In a booming victory speech punctuated by fireworks from the balcony of the presidential palace, Morales called on all sectors of society _ including the opposition _ to unite behind him.

"We have the enormous responsibility to deepen and accelerate this process of change," he said, insisting final results will give him two-thirds of both chambers of Congress.

The lopsided results signaled an opposition in disarray.

"Evo Morales has a mandate unlike any other president in the hemisphere, including Barack Obama," said analyst Jim Shultz of the nonprofit Democracy Center in Cochabamba. "This is the fifth national election in four years and his margin of victory has only increased each and every time."

Even in the opposition bastion of Santa Cruz state, Reyes led with only 50 percent, compared to 43 percent for Morales.

The three political parties that dominated Bolivian politics for decades have now been all but erased. The last survivor was the National Union. Its presidential candidate, Samuel Doria Medina, a centrist cement magnate, got just 6 percent of the vote, according to the quick counts.

Voters also chose a new Congress, and the quick count said Morales' stridently leftist Movement Toward Socialism easily won a majority in both the 36-seat Senate and 130-member lower house.

The movement appeared to secure two-thirds in the Senate but fall just short in the lower house.