The Jerusalem Post reports that, although Israel, Jordan, Saudi Arabia, the United Arab Emirates, Bahrain and Qatar have all sent representatives to Warsaw for the conference, Palestinian Authority officials are boycotting the US -sponsored confab due to the Trump administration's 2018 recognition of Jerusalem as Israel's capital and its relocation of its Israeli embassy to that capital.
On the sidelines, Israeli Prime Minister Benjamin Netanyahu met Oman's foreign minister.
Vice President Mike Pence is leading the USA delegation, accompanied by Secretary of State Mike Pompeo and White House advisor Jared Kushner.
"The result of this conference ideally would be a demonstration of Iranian isolation and unity amongst American allies in Europe and the Middle East", said William Wechsler, senior adviser for Middle East programs at the Atlantic Council in Washington.
The Israeli prime minister often speaks of Iran as an existential threat, and President Donald Trump, a close ally of Netanyahu, has placed the United States on a much more confrontational footing with the regime, even while he decries military conflicts in the Middle East.
"Many are following in your footsteps, including among those here today at the conference", a statement released by Netanyahu's office quoted him telling, whose Gulf state hosted the Israeli leader in October. For his part, Omani Foreign Minister Yusuf bin Alawi bin Abdullah said, "People in the Middle East have suffered a lot because they have stuck to the past". The meeting occurred a conference in Poland, The Hill reported. "Now we say, this is a new era, for the future".
On Wednesday, Netanyahu boasted of the strong ties Israel is building with Arab countries in the region.
Netanyahu is one of the highest-ranking officials in attendance at the summit, alongside foreign ministers and officials from 60 other countries.
Before broadening the agenda, the U.S. initially told allies the meeting would focus on Iran, a bête noire for national security adviser John Bolton and Secretary of State Mike Pompeo, both of whom have advocated for regime change in Tehran in the past.
Transatlantic cooperation was necessary to resolve problems in the Middle East, Polish Foreign Minister Jacek Czaputowicz said.
Netanyahu says he doesn't think the Trump administration's "Deal of the Century" peace plan will be discussed.
Rather, Netanyahu told reporters Tuesday evening, the conference will have a clear emphasis on efforts to thwart Iranian aggression.