"This is happening and well underway thanks to his efforts. The administration... will carry the mission forward," Palladino said in Amman where he accompanied Pompeo on the first leg of his regional tour.
The Middle East Strategic Alliance (MESA) is a NATO-style security pact which Zinni had been asked to introduce to regional leaders.
On June 5 of that year, Saudi Arabia, Bahrain, the United Arab Emirates and Egypt cut ties with key US ally Qatar, accusing it of supporting "terrorist groups" and advocating improved ties with their rival Iran.
Qatar, home to a huge US air base, has denied the claims.
Sustaining a regional coalition to counter Iran, is a major focus of Pompeo's tour of eight Arab capitals in as many days.
The trip will include stops in the six countries that form the Gulf Cooperation Council (GCC) -- Saudi Arabia, Qatar, the United Arab Emirates, Kuwait, Bahrain and Oman -- as well as Egypt and possibly Iraq.
State Department officials have said Pompeo hopes his trip will fortify the GCC which has been weakened by the Gulf diplomatic crisis, and organise a summit of its leaders in the United States later this year.
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