A senior administration official said the president would also say he is beginning a long process of moving America’s embassy there from Tel Aviv.
‘The president believes this is a recognition of reality,’ he said.
While Israel welcomed the news, Palestinian officials declared the Mideast peace process ‘finished’ and Turkey announced it would host a meeting of Islamic nations next week to give Muslim countries’ leaders an opportunity to coordinate a response.
In Gaza, U.S. and Israeli flags were burned and in the West bank Hamas declared Friday a ‘day of rage,’ raising the specter of mass violence in the occupied territories.
Israeli security forces braced for violence but said so far the situation was peaceful.
The Pope made a plea for Trump to rethink urgently and spoke out at his weekly general audience in Rome .
‘I make a heartfelt appeal so that all commit themselves to respecting the status quo of the city, in conformity with the pertinent resolutions of the United Nations,’ Pope Francis said.
The Roman Catholic Pontiff told thousands of people at his general audience: ‘I cannot keep quiet about my deep concern about the situation that has been created in the last few days.’
A Turkish government spokesman said that the move will plunge the region and the world into ‘a fire with no end in sight.’
Scroll down for video
In the UK Prime Minister Theresa May said she would challenge the country’s closest ally.
‘I’m intending to speak to President Trump about this matter,’ May told MPs.
‘Our position has not changed, it has been a long standing one and it is also a very clear one.
‘It is that the status of Jerusalem should be determined in a negotiated settlement between the Israelis and the Palestinians, and Jerusalem should ultimately form a shared capital between the Israeli and Palestinian states.’
The harsh global reaction cast questions about the feasibility of a brewing U.S. peace plan that is expected to be presented by the White House in the near future.
Trump would effectively be making a declaration of war, the Palestinians’ chief representative to Britain said Wednesday.
‘If he says what he is intending to say about Jerusalem being the capital of Israel, it means a kiss of death to the two-state solution,’ Manuel Hassassian said in a BBC radio interview.
‘He is declaring war in the Middle East, he is declaring war against 1.5 billion Muslims [and] hundreds of millions of Christians that are not going to accept the holy shrines to be totally under the hegemony of Israel,’ Hassassian added.
The Palestinians seek east Jerusalem as the capital of a future independent state and fear that Trump’s declaration essentially imposes on them a disastrous solution for one of the core issues in the Israeli-Palestinian conflict.
‘There is no way that there can be talks with the Americans. The peace process is finished. They have already pre-empted the outcome,’ said Palestinian official Hanan Ashrawi. ‘They cannot take us for granted.’
The U.S. decision ‘destroys the peace process,’ added Palestinian Prime Minister Rami Hamdallah. Top Palestinian officials were meeting Wednesday to plot their course forward.
U.S. officials said late Tuesday that Trump will recognize Jerusalem as Israel’s capital, despite intense Arab, Muslim and European opposition to a move that would upend decades of U.S. policy and risk potentially violent protests.
Moving the embassy will be a longer process.
‘This will be a matter of some years. It won’t be immediate, it won’t be months, it won’t be quick,’ a senior administration official said Tuesday night.
‘For instance,’ he said, ‘the United States was looking at moving out of Grosvenor Square in London for a long, long time. And I think that took something like eight years to get done and will be done in early 2018.’
‘It is a practicable impossibility to move the embassy tomorrow,’ another official said. ‘There are about 1,000 personnel in the embassy in Tel Aviv. There is no facility they can move into in Jerusalem, as of today.’
‘It will take some time to find a site, address security concerns, design a new facility, fund a new facility – working with Congress, obviously – and build it. So this is not an instantaneous process.’
Israel is the only country where the United States has an embassy in a city that the host nation does not consider its capital.
Israel’s prime minister, Benjamin Netanyahu, said on Facebook that ‘Our historical national identity is receiving important expressions every day.’ He said he would comment further later in the day.
Other members of his Cabinet were more forthcoming. Education Minister Naftali Bennett, head of the nationalist Jewish Home party, praised what he called Trump’s ‘bold and yet natural’ move.
‘The sooner the Arab world recognizes Jerusalem as our capital, the sooner we will reach real peace. Real peace that is not predicated on an illusion that we are going to carve up Jerusalem and carve up Israel,’ Bennett told The Associated Press on the sidelines of the Jerusalem Post Diplomatic Conference.
The Family Research Council, an American evangelical Christian group, was enthusiastic.
‘America’s foreign policy, as it pertains to Israel, is coming into alignment with this biblical truth: Jerusalem is the eternal and indivisible capital of the Jewish state,’ the group’s president Tony Perkins said.
International leaders, however, swiftly criticized Trump’s plan.
China, which has good ties with Israel and the Palestinians, expressed concerns over ‘possible aggravation of regional tensions.’
Chinese Foreign Ministry spokesman Geng Shuang said during a news briefing that the status of Jerusalem was a complicated and sensitive issue and China was concerned the U.S. decision ‘could sharpen regional conflict.’
‘All parties should do more for the peace and tranquility of the region, behave cautiously, and avoid impacting the foundation for resolving the long-standing Palestine issue and initiating new hostility in the region,’ Geng said.
Russia, a key Mideast player, expressed its concern about a ‘possible deterioration.’
Two leading Lebanese newspapers published front-page rebukes of Trump.
Britain’s Foreign Minister, Boris Johnson, who had already expressed concern about the U.S. decision, on Wednesday said it was now time for the Americans to present their peace plan for the region.
‘Jerusalem obviously should be part of the final settlement between the Israelis and the Palestinians – a negotiated settlement that we want to see,’ Johnson said.
‘We have no plans ourselves to move our embassy.’
In Brussels Secretary of State Rex Tillerson tried to dampen down the reaction.
‘The president is very committed to the Middle East peace process,’ Tillerson told reporters at a meeting of NATO foreign ministers in Brussels.
He said a small team led by Trump’s son-in-law and senior adviser Jared Kushner – a 36-year-old former property developer – has been ‘engaged in a quiet way’ in the region to try to revive peace talks between Israel and the Palestinians.
‘We continue to believe there is a very good opportunity for peace to be achieved and the president has a team that is devoted to that entirely,’ Tillerson said.
Trump’s Mideast team have spent months meeting with Israeli, Palestinian and Arab leaders. Details of their long awaited plan remain a mystery.
‘Clearly this is a decision that makes it more important than ever that the long-awaited American proposals on the Middle East peace process are now brought forward,’ Johnson told reporters in Brussels.
In his speech, Trump was expected to instruct the State Department to begin the multi-year process of moving the American Embassy from Tel Aviv to the holy city. It remained unclear, however, when he might take that physical step, which is required by U.S. law but has been waived on national security grounds for more than two decades.
To that end, the officials said Trump would delay the embassy move by signing a waiver, which is required by U.S. law every six months. He will continue to sign the waiver until preparations for the embassy move are complete.
The officials, speaking on condition of anonymity pending Trump’s announcement, said the decision was merely an acknowledgment of ‘historical and current reality’ rather than a political statement and said the city’s physical and political borders will not be compromised.
They noted that almost all of Israel’s government agencies and parliament are in Jerusalem, rather than Tel Aviv, where the U.S. and other countries maintain embassies.
Still, the declaration of Jerusalem as Israel’s capital carries deep symbolic significance and could have dangerous consequences. The competing claims to east Jerusalem, the section of the city captured by Israel in 1967, have frequently boiled over into deadly violence over the years.
East Jerusalem is home to the city’s most sensitive Jewish, Muslim and Christian holy sites, as well as its 330,000 Palestinian residents.
The United States has never endorsed the Jewish state’s claim of sovereignty over any part of Jerusalem and has insisted its status be resolved through Israeli-Palestinian negotiation.
The mere consideration of Trump changing the status quo sparked a renewed U.S. security warning on Tuesday. America’s consulate in Jerusalem ordered U.S. personnel and their families to avoid visiting Jerusalem’s Old City or the West Bank, and urged American citizens in general to avoid places with increased police or military presence.
Trump, as a presidential candidate, repeatedly promised to move the U.S. Embassy. However, U.S. leaders have routinely and unceremoniously delayed such a move since President Bill Clinton signed a law in 1995 stipulating that the United States must relocate its diplomatic presence to Jerusalem unless the commander in chief issues a waiver on national security grounds.
Key national security advisers – including Secretary of State Rex Tillerson and Defense Secretary Jim Mattis – have urged caution, according to the officials, who said Trump has been receptive to some of their concerns.