FILE - In this Friday, Nov. 11, 2016, file photo, Palestinian president Mahmoud Abbas speaks during a press conference with Russian Prime Minister Dmitry Medvedev following a meeting in the West Bank city of Jericho. A leadership conference of the Palestinian Fatah movement has unanimously re-elected President Mahmoud Abbas to a new five-year term. (AP Photo/Majdi Mohammed, File)

RAMALLAH, Palestinian Territory - President Mahmoud Abbas' long-dominant Fatah movement on Tuesday opened a conference that is expected to cement the rule of the 81-year-old Palestinian leader and lock out his chief rival from decision making for at least the next five years.

Some 1,400 members of Fatah gathered in Ramallah for the five-day conference, where delegates are to hold elections for the party's two main decision-making bodies. While the elections are expected to bring some new faces into the leadership structure, the conference's main purpose appears to be aimed at blocking the return of Abbas' exiled rival, Mohammed Dahlan. There also are no plans to designate a successor to Abbas, despite his advanced age and a history of health issues.

In a first step, the delegates unanimously re-elected Abbas as the party leader for a new five-year term. Party official Salim Zanoun asked the hall to vote for Abbas, and participants all stood up and warmly cheered. A smiling Abbas then hugged Zanoun.

"The Fatah conference is the conference of the independent Palestinian decision, the conference of building and liberation, and national unity," Abbas said. Late Tuesday, Abbas postponed a planned speech to the conference. Officials said he would instead address the gathering on Wednesday.

Dahlan, who was forced to leave the West Bank six years ago after a falling out with Abbas, now lives in the United Arab Emirates. He has forged close ties with the leaders of the UAE, Egypt, Saudi Arabia and Jordan.

In recent months, these countries, known as the Arab Quartet, have pressured Abbas to allow Dahlan to return to a leadership position. Abbas, accusing his Arab allies of meddling in his affairs, instead decided to schedule the Fatah elections, while blocking Dahlan and his close allies from participating.

Abbas' supporters rejected criticism that he was focused on Dahlan. They say that the conference, two years behind schedule, had to be held to revive the movement.

Fatah has dominated Palestinian politics since its founding five decades ago. But Abbas has seen his popularity plummet due to years of failed peace efforts with Israel, a stagnant West Bank economy and his inability to reconcile with the rival Hamas movement, which seized control of the Gaza Strip from his forces nearly a decade ago. Abbas now only governs autonomous areas of the Israeli-occupied West Bank.

In addition, the election of Donald Trump has given the Palestinians little room for optimism. Although the U.S. President-elect has not yet laid out a Mideast policy, many of his advisers are known for hard-line positions in favour of Israel and against the Palestinians.

"This congress is taking place in a crucial moment in the history of the Palestinian people. We have to discuss our aspirations, our concerns, and challenges," said Jibril Rajoub, a senior Fatah leader and Abbas loyalist.

"We have to build a strategy, consolidating the movement, and achieving national unity," he said, adding, "Dahlan is past. He has no place in the movement."

Participants were coming from the West Bank, Gaza Strip, as well as diaspora communities scattered across the Arab world and in the West. The convention is to conclude with elections for 18 spots in the Central Committee, the top decision making body, and 80 members of the movement's parliament, the Revolutionary Council.

Participants reported fierce lobbying in the fight for seats on the two prestigious bodies. The struggle will include attempts by some younger activists to land seats in what are often seen as stodgy bodies dominated by men in their 70s and 80s.

But none of Abbas' key policies toward Israel are expected to change. Abbas, who succeeded the late Yasser Arafat in 2005, seeks the establishment of an independent Palestinian state in the West Bank, Gaza Strip and east Jerusalem — territories captured by Israel in the 1967 Mideast war.

Many members have accused Abbas of orchestrating the convention to consolidate his grip on the movement.

"The convention is meant to exclude all critical voices in the movement," said Jamal Jahjouh, Fatah's leader in the Qalandia refugee camp in the West Bank.

He said Fatah leaders had excluded key activists from this week's convention and replaced them with Abbas loyalists. He said members of the movement in his camp would protest Tuesday to voice their opposition to Abbas and his convention.

Dahlan was expected to remotely deliver a speech to the convention on Tuesday. His supporters say they plan to hold an alternative convention with 2,000 members in Egypt in the near future to voice their criticism of Abbas and opposition to his policies.

News from © The Associated Press, 2016