There had been speculation during Mr final presidential visit to Ireland in December that he might act as a peace envoy on leaving office in a bid to safeguard the agreement.
He himself was injured in 2011, when the man in charge of peace talks - the former Afghan President Burhanuddin Rabbani - was killed by a suicide bomber disguised as a Taliban peace envoy.
BBC: Afghanistan eyes Taliban peace ahead of Nato withdrawal
Former prime minister Tony Blair, who is now a Middle East peace envoy, was commended for "making an important contribution to Palestinian economic and institutional development".
The visit, which came a day after former British Prime Minister Tony Blair made his first trip as new Mideast peace envoy, is part of a flurry of diplomatic efforts meant to restart peace talks after a seven-year lull.
Meantime, Obama has named a new Middle East Peace envoy, former Sen.
Mr Blair now works as a UN Middle East peace envoy.
BBC: Tony Blair: I'd have done better than Brown in 2010 election
Israeli and Palestinian security officials agreed a few days earlier to try to work out a truce before US peace envoy Anthony Zinni returns to the region, on or around 18 January.
Their peace envoy, a former marine commander, Anthony Zinni, has been told to stay in the region and keep at his thankless mission of trying to arrange a ceasefire between Israel and an authority on which Israel has ostensibly declared all-out war.
In a separate development on Sunday, UN-Arab League peace envoy Lakhdar Brahimi called for international backing for a Syrian opposition offer to negotiate with some government officials.
BBC: Israel treats wounded seven Syrians as "exceptional" case
Former Liberal Democrat leader Sir Paddy Ashdown could be heading for a new role as the United Nations peace envoy in Bosnia.
In Amman, Jordan, King Abdullah II voiced his skepticism about the U.S. peace conference in a meeting with Mideast envoy Tony Blair.
Robinson should start negotiations that would subsume the Kampala talks, and the Obama administration should follow the U.N. lead in appointing a senior-level envoy to the peace process and ensure that regional economic integration and security issues are brought to the fore of the process.
Afterward, the two leaders issued a statement calling for "an immediate cessation of all violence" and expressing support for efforts by U.N. and Arab League joint special envoy Kofi Annan to broker a peace deal.
To this end, in his policy speech at Bar-Ilan University's Begin-Sadat Center on Sunday, Netanyahu should announce that in the interests of fostering cooperation with the US and advancing prospects for peace, he is appointing a special prime ministerial envoy to Obama's special presidential envoy Mitchell.
Kofi Annan, the joint UN-Arab League envoy and sponsor of a six-point peace plan, flew to Damascus to plead with President Bashar Assad to uphold the ceasefire ostensibly in place since April.
Secretary-General Kofi Annan, now the United Nations and Arab League joint special envoy to Syria, brokered a six-point peace plan in March.
Shortly before Dec. 1, the Bush administration had bent to Arab demands and became seriously reinvolved in brokering peace, explicitly advocating a Palestinian state and sending a special envoy, Gen.
This month, Yasushi Akashi, a special envoy from Japan, had to cancel a planned peace mission to Sri Lanka when Velupillai Prabhakaran, the Tigers' elusive and ruthless supremo, refused to meet him.
We expect that at some point, I would say in the next hour or so, Senator Mitchell, our special envoy for Middle East peace, will conduct a briefing on what has transpired today.
Washington is supporting U.N. and Arab League envoy Kofi Annan's peace initiative, which calls for a cease-fire and a political solution.
CNN: Military options for Syria considered if crisis worsens
To seek progress towards a secure and lasting peace between Israel and her neighbors, we have appointed an envoy to sustain our effort.
Meanwhile, the senior U.S. envoy who had spearheaded efforts to get Milosevic to sign onto a Kosovo peace deal said Thursday the Yugoslav president was "a formidable adversary" who chose bombings over diplomacy.
CNN: Captured U.S. soldiers face military court in Yugoslavia
The cease-fire went into effect April 12 and is part of a six-point peace plan negotiated by U.N. and Arab League joint special envoy Kofi Annan.
And he named another envoy to seek peace between the Israelis and the Palestinians: George Mitchell, a former Senate majority leader who helped broker peace in Northern Ireland.
Clinton made the comment after a meeting in Washington with Russian envoy Viktor Chernomyrdin, who carried Russia's latest proposals for peace in Kosovo.
It has authorized up to 300 monitors in Syria to monitor a cease-fire and the six-point peace plan of U.N. and Arab League envoy Kofi Annan.
CNN: U.N. notes cease-fire violations from both sides in Syria
"My message to special envoy Brahimi is simple: The United States stands ready to support you and secure a lasting peace that upholds the legitimate aspirations for a representative government of the people of Syria, " she said.
George Mitchell as his envoy for the so-called Palestinian-Israeli "peace process" will provide us with a spectacle of an unvarnished repeat of history.
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