WASHINGTON/RIYADH - Addressing the United Nations General Assembly in September, President Barack Obama declared the pursuit of Israeli-Palestinian peace one of the two main US foreign policy priorities for his second term.
Fast-forward to today, the Obama administration faces a stark choice: expend more energy on a faltering peace process or absorb the hit to an already-troubled record in the Middle East and walk away from negotiations.
Secretary of State John Kerry, who met Obama on Tuesday for a "reality check," says he hopes both sides will work with US mediators to "find a way back." But as optimism fades, many inside and outside the Middle East warn now is not the time for a US diplomatic failure in the region.
"A collapse of the peace process would only add to the perception that we really don't know what we're doing," said Aaron David Miller, a former US peace negotiator.
Asked to what extent US credibility would be damaged if the peace process failed, Mustafa Alani, a senior adviser at the Gulf Research Center think tank who has close ties to Saudi security officials, suggested Arab expectations of Washington were already about as low as they could get.
"That's because Arabs never trusted this administration as a peacemaker," he said.
But a senior US official insisted any decision on Middle East diplomacy would hinge not on US prestige but on whether it serves national interests and aids regional stability.
While successive administrations have come up dry in decades of Israeli-Palestinian peacemaking, the latest initiative faces trouble at a delicate time as Washington seeks to weather criticism for not doing enough to curb Syria's civil war and engages in high-stakes nuclear talks with Iran.
On top of that, US inaction over the military's tightening grip in Egypt, upheaval in post-Gaddafi Libya and renewed sectarian bloodshed in Iraq have raised questions about the administration's broader Middle East agenda.
Polls show attitudes toward the United States languishing in much of the Arab world, where Obama once promised a "new beginning" in relations with Washington after his predecessor, George W. Bush, was widely reviled because of the Iraq war.
Doubts about the Obama administration's ability to broker Israeli-Palestinian peace and an overall lack of confidence in its leadership in the region appear widespread, even though US officials insist that Washington's influence remains solid.
Even among Israelis, who count on the United States as their closest ally, Kerry's peace bid continues to be a tough sell.
"John Kerry took this issue very seriously," said Moshe Arens, a former Israeli foreign and defense minister who also served as ambassador to Washington. "But my guess is he did not really understand the reality of the area."
Kerry faced an even harsher assessment when he testified on Capitol Hill on Tuesday. "You can't help but get the impression that our foreign policy is simply spinning out of control," Senator James Risch, an Idaho Republican, told Kerry, who gave an impassioned defense of the administration's record.
BIG ROLLOUT, THEN SCALED-BACK EXPECTATIONS
When Kerry convinced Obama to push Middle East peace toward the top of his second-term foreign policy agenda last year, the strategy was cast as a way to create goodwill toward the United States in a region where Arab Spring popular revolts were toppling long-time rulers.
The idea was not only to win credit for tackling the decades-old Arab-Israeli conflict but also to rob Islamist groups like al-Qaida of a recruiting tool and take away one of Iran's main arguments for supporting anti-Israel militants.
But Kerry's peace drive was met with deep skepticism from the start, and over the course of more than eight months of tireless diplomacy neither side has been willing to make the tough compromises needed to achieve a peace deal.
That has prompted Kerry to steadily scale back his ambitious goals - to the point where now even getting talks extended beyond an April 29 deadline would qualify as an achievement.
Negotiations plunged into crisis last week in a series of tit-for-tat moves by Israelis and Palestinians.
By stepping away for now, Kerry has reminded the parties that he can ill-afford to focus endlessly on a fruitless peace process when other pressing international issues, such as the crisis in Ukraine, demand his attention, US officials say.
Israel and Palestinians were quick to restart discussions and the administration says it has not thrown in the towel, but the outlook remains bleak and Kerry can be expected to take a lower-profile role even if the peace process survives.
Despite having prioritized Israeli-Palestinian peace along with an Iran nuclear deal in his UN speech, Obama has mostly kept his distance from the nuts and bolts of the Middle East negotiations, seemingly wary that the effort could suffer the fate of his own failed first-term initiative.
But seeking to tamp down speculation that Obama might pull the rug out from under Kerry, a White House aide said the president told his national security team on Friday: "I see a lot of senior officials quoted about Kerry and Middle East peace. But I'm the most senior official, and I have nothing but admiration for how John has handled this."
Washington is clearly mindful that abandoning the peace effort now would carry risks, including reinforcing the image of an administration seeking to disengage from the Middle East.
"There's tremendous upheaval in the region and internationally right now. Do you want to add to it?" said Dennis Ross, Obama's former top Middle East adviser. "We don't need to see something we've been investing in collapse."
With the administration moving only haltingly on limited arms shipments to Syrian rebels, some analysts believe a breakdown in the peace process could embolden Syrian President Bashar Assad by showing US weakness in the region.
US allies Israel and Saudi Arabia already fear Obama's failure to strike Assad over chemical weapons use last year suggests that war-weary Washington would not have the stomach to use force to prevent Iran from developing nuclear weapons.
There are also concerns in the region that Iran could see troubles in the peace process as a sign that the Obama administration might be desperate for a diplomatic success and that Tehran could then take a tough line against concessions in nuclear talks.
But a senior US official said the administration saw no link between Middle East diplomacy and the Iran or Syria issues.
Even so, fallout for the United States may be limited because Arab leaders and their nations are now more focused on their own internal problems and less so on the Israeli-Palestinian issue once seen as the region's core conflict.
"All Arabs are preoccupied with calls for revolutions and reforms," Joseph Kechichian, a Beirut-based historian, said of the Gulf Arab states who are close to the Saudi ruling family.
But he added: "The Palestinian question will not go away."