ISTANBUL — U.S. Secretary of State John Kerry struggled Sunday to convince Turkey's leaders they should promptly restore full diplomatic ties with Israel, two American allies counted on by President Barack Obama to help calm the turbulent Middle East.
But Turkey demanded that Israel first end all commercial restrictions against the Palestinians before the once-close partners could end their estrangement, which stems from an Israeli raid in 2010 on a flotilla bound for the Gaza Strip. Eight Turks and a Turkish-American died.
Obama revived the rapprochement during a visit to Israel last month, and Kerry aimed to firm that up in Istanbul, the first stop in a 10-day trip.
The stakes are high, given that the U.S. sees Turkey and Israel as anchors of stability in a region riven by Syria's civil war, Arab Spring political upheavals and the potential threat posed by Iran's nuclear program.
"We would like to see this relationship that is important to stability in the Middle East and critical to the peace process ... get back on track in its full measure," Kerry told reporters at a news conference with Foreign Minister Ahmet Davutoglu.
Kerry said that meant promises of "compensation be fulfilled, ambassadors be returned and that full relationship be embraced."
He also met with Prime Minister Recep Tayyip Erdogan and then went to Israel.
Obama, before leaving Israel two weeks ago, arranged a telephone conversation between Israeli Prime Minister Benjamin Netanyahu and Erdogan. Netanyahu apologized for the flotilla incident; compensation talks are expected to begin this week.
But Davutoglu suggested that full normalization of ties would probably take some time.
"There is an offense that has been committed and there needs to be accountability," Davutoglu said.
He signaled that Turkey would pursue a "careful" advance toward a complete restoration of relations, with compensation and an end to Israeli trade restrictions on the Gaza Strip as the stumbling blocks.
"All of the embargoes should be eliminated once and for all," he said through an interpreter.
Fixing the relationship long has been a goal of the Obama administration, and the U.S. desperately wants significant progress by the time Erdogan visits the White House in mid-May.
The Turks have reveled somewhat in what they view as a diplomatic victory, with billboards in Ankara celebrating Netanyahu's apology and praising Erdogan for bringing pride to his country.
Perhaps seeking to add to his leverage, Erdogan indicated shortly after the call that he was in no hurry to finalize the deal and pledged to visit the Hamas-controlled Palestinian territory soon.
From a U.S. strategic sense, cooperation between the American allies has only become more important as Syria's 2-year conflict has grown ever deadlier.
More than 70,000 people have died in the war, according to the United Nations, but the U.S. fears it could get even worse, by spilling into neighboring countries or through the use of chemical weapons.
Both potential scenarios have led to intense contingency planning among Washington and its regional partners, including Israel and Turkey.
Kerry, who noted his twice-weekly telephone chats with Davutoglu, spoke of shared U.S. and Turkish efforts to support Syria's opposition coalition.
The opposition has suffered from poor coordination between its political leadership and the military factions leading the fight against the government of Syrian President Bashar Assad, and from intense infighting among those who seek to guide the amorphous movement's overall strategy.
Turkey has gone further than the U.S. in its assistance, accepting some 180,000 Syrians as refugees and sending advanced weaponry to rebels fighting to overthrow Assad.
The U.S. is only providing nonlethal aid to the rebels in the form of meals, medical kits and training.
Kerry praised Turkey for its generosity toward refugees and commitment to keeping its borders open, an issue of growing U.S. concern as the outflow of Syrians stretches the capacities of neighboring countries to accommodate them.