The news comes after Washington said Trump would host Qatar's Emir Tamim bin Hamad Al Thani on April 10 in an effort to end a diplomatic spat that has riven America's Gulf allies.
Bahrain, Egypt, Saudi Arabia and the UAE cut diplomatic and trade ties with Qatar last year, accusing Doha of bankrolling Islamist extremists and fostering ties with Saudi arch-rival Iran.
The White House said Trump spoke on the phone with bin Zayed, his country's de facto ruler, "to discuss regional developments and opportunities for increasing cooperation on a range of security and economic issues."
It said the pair "agreed on the importance of a united GCC," in what appeared to be a reference to the regional dispute, since the GCC member countries are Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the UAE.
Aides -- mindful of the pivotal role that the Al Udeid Air Base outside Doha plays in US Middle East operations -- have since convinced him to take a more moderate approach.
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