United States President Donald Trump is expected to soon release his long-awaited Middle East plan - more than two years after his administration began drafting its vision for a solution to the Israeli-Palestinian conflict.

The policy proposal has been delayed multiple times and has been kept largely under wraps.

Here is what we know so far:

The timing

Trump said the White House will release the plan on Tuesday at 17:00 GMT.

The US president held separate meetings on Monday with Israeli Prime Minister Benjamin Netanyahu and his rival in the upcoming Israeli elections, Benny Gantz. The Palestinian leadership, which has rejected the proposal before it is even released, was not invited to Washington, DC.

Sitting down in the Oval Office during his meeting with Netanyahu, Trump said his plan "makes sense for everybody", and said that for Palestinians, "it's something they should want".

"They probably won't want it initially," Trump said. "But I think in the end they will ... It's very good for them. In fact, it's overly good to them. So we'll see what happens. Now without them, we don't do the deal and that's OK."

Trump added, "We think there's a very good chance that they're going to want this."

The proposal is expected to be favourable to Israel, and Netanyahu has hailed it as a chance to “make history” and define Israel’s final borders. He also invited several settler leaders to join him in Washington for the roll-out of the plan.

Trump held a separate closed-door meeting with Gantz.

"The president's peace plan is a significant and historic milestone indeed," Gantz told reporters later.

"Immediately after the elections, I will work toward implementing it from within a stable, functioning Israeli government, in tandem with the other countries in our region."

The plan will be rolled out as Trump's Senate impeachment trial continues on Capitol Hill and as Netanyahu seeks parliamentary immunity from prosecution in corruption cases. Both leaders also face re-elections: Israelis are due back in the polls on March 2 and Trump is gearing up for the US presidential election on November 3.

The US has tried to release the plan multiple times previously, but Israel has been engulfed in a political crisis after Netanyahu failed to form a majority government twice last year, creating uncertainty over who would be in charge to negotiate a peace deal.

"There have been several false starts by the US administration in the unveiling of a plan that has been ready for some time now," said Lucy Kurtzer-Ellenbogen, the director of the Israeli-Palestinian Conflict Program at the United States Institute of Peace.

"Some think that the administration is running out of patience waiting for Israeli elections that may yet again not be conclusive," Kurtzer-Ellenbogen told Al Jazeera.

Observers say by inviting both leading candidates, the US may be hoping to get Israel's next prime minister on board in advance.

Palestinian rejection

The Palestinians have already dismissed "the deal of the century," as the plan is widely dubbed, saying it will likely be heavily tilted in Israel's favour - like several other steps taken by Trump since taking office in January 2017.

Over the past three years, the Trump administration recognised Jerusalem as Israel's capital and relocated the US embassy there from Tel Aviv; reversed decades of US policy by refraining from endorsing a two-state solution; announced that it no longer views Israeli settlements in occupied territory as "inconsistent with international law"; stopped funding the United Nations' Palestinian refugee agency UNRWA; and slashed hundreds of millions of dollars of aid to Palestinians, among other steps.

The Palestinian Authority (PA) cut off all talks with Washington since the first of these moves, and a spokesman for PA President Mahmoud Abbas said this week that the Palestinian leadership had a "clear and unwavering position" to reject any Trump-led initiatives.

Palestinian Prime Minister Mohammad Shtayyeh denounced the still-unpublished proposal in Ramallah on Monday, saying: "We reject it, and we demand the international community not be a partner to it because it contradicts the basics of international law and inalienable Palestinian rights."

Shtayyeh added, "It is nothing but a plan to finish off the Palestinian cause."

In a Twitter post, Saeb Erekat, the secretary general of the Palestine Liberation Organization, said any proposal that ignored Palestinian rights would be "recorded in history as the fraud of the century".

Reminder to the International Community:Israel is an Occupying Power of the State of Palestine on the 1967 borders ( East Jerusalem, West Bank and Gaza Strip ).Any deal, attempt or dictation that ignores this fact, will be recorded in history as the Fraud of the century — Dr. Saeb Erakat الدكتور صائب عريقات (@ErakatSaeb) January 24, 2020

Trump said his administration has talked "briefly" to the Palestinians.

"But we will speak to them in a period of time," he added. "And they have a lot of incentive to do it. I'm sure they maybe will react negatively at first, but it's actually very positive to them."

"We took away their money," Trump added. "That's a lot of money for them."

Jordanian protesters take part in a protest against the 'deal of the century', after Friday prayers in Amman, Jordan, with banners reading 'Down with the agreement of humiliation and shame' and 'Jerusalem supports whoever supports it' [File: Muhammad Hamed/Reuters]

Israeli-Palestinian peace talks collapsed in 2014, and Palestinians say the policies of the Trump administration have rendered Washington incapable of being an honest mediator in any future negotiations.

"This peace plan is a euphemism," said Noura Erakat, a human rights lawyer and assistant professor at Rutgers University. "There is no peace involved in it."

"It is an oppressive, top-down dictate to the Palestinians that the United States together with Israel are about to seal an oppressive status quo for Palestinians," Erakat told Al Jazeera.

The Palestinians want Israel to fully withdraw from the occupied West Bank, Gaza Strip and East Jerusalem - territories Israel has been occupying since the 1967 war. The Palestinians want those territories to become part of a future independent state, with East Jerusalem as its capital. They also seek the right of return for millions of refugees.

Economic plan

The economic portion of the veiled plan was published on June 22, just before its presentation in a gathering in Bahrain, which was boycotted by the Palestinian leadership.

Trump's son-in-law and senior adviser Jared Kushner proposed a $50bn investment fund during a two-day workshop called Peace to Prosperity aimed at boosting the Palestinian and neighbouring Arab economies, arguing that this approach could generate prosperity in the occupied Palestinian territories, and Jordan, Egypt and Lebanon.

Jared Kushner speaking at the Peace to Prosperity conference in Manama, Bahrain [File: Handout via Reuters]

The plan included infrastructure, business and tourism projects as well as the construction of a travel corridor in Israel that would link the West Bank and Gaza Strip with a highway.

Israeli government officials did not attend the event in Manama while several Arab states stayed away or sent low-level delegations.

Contents of the plan

The development of the plan began in November 2017 by a Kushner-led team of advisers and officials including chief negotiator Jason Greenblatt, Deputy National Security Adviser Dina Powell and Ambassador to Israel David Friedman.

The plan is reportedly dozens of pages long, but its political outlines remain a closely guarded secret.

Kushner said the proposal would not include the phrase "two-state solution". Previous US administrations oversaw the peace process between the two sides based on the two-state solution, which sees a Palestinian state established within the June 4, 1967 borders with East Jerusalem as its capital.

"If you say 'two-state', it means one thing to the Israelis, it means one thing to the Palestinians," Kushner told the Washington Institute for Near East Policy in May.

US Ambassador to Israel David Friedman and White House Middle East envoy Jason Greenblatt attending the opening of an ancient road in the occupied East Palestinian neighbourhood of Silwan [File: Tsafrir Abayov/Pool via Reuters]

"We said, 'You know, let's just not say it. Let's just say, let's work on the details of what this means.'"

In an interview with the Times of Israel in 2018, Greenblatt said: "It will include a resolution to all of the core issues, including the refugee issue, and will also focus on Israel's security concerns." In fact, he added, the proposal will "be heavily focused on Israeli security needs".

"But we also want to be fair to the Palestinians. We have tried hard to find a good balance. Each side will find things in this plan that they don't like. There are no perfect solutions."

Palestinians fear that the plan seeks to use economic incentives to bribe them into accepting Israeli occupation, in what could be an Israeli aim to annex the majority of the West Bank and most of the Jordan Valley, a strategic and fertile strip of territory.

International support not guaranteed

It remains unknown what effect the announcement will have, and what will follow. It is also unclear if the plan will garner any international support. The UN and most of the international community have long supported a negotiated two-state solution as the basis of any plan in the region.

"There are some in the White House who genuinely believe that there is enough in this plan that might make the Palestinian side think twice and after reading it might say, 'We don't like it but let's talk'," said Hady Amr, former deputy special envoy for the Israeli-Palestinian conflict under the administration of Trump's predecessor, Barack Obama.

"We don't know exactly what is going to happen, but we do know that they have something rigorous that has been written up," Amr told Al Jazeera.

"It will not answer every question, but it will answer a number of questions."