Leading Persian Gulf states want major new weapons systems and security guarantees from the White House in exchange for backing a nuclear agreement with Iran, according to U.S. and Arab officials.

The leaders of the six-nation Gulf Cooperation Council, including Saudi Arabia, the United Arab Emirates and Qatar, plan to use a high-stakes meeting with President Barack Obama next week to request additional fighter jets, missile batteries and surveillance equipment.

They also intend to pressure Mr. Obama for new defense agreements between the U.S. and the Gulf nations that would outline terms and scenarios under which Washington would intervene if they are threatened by Iran, according to these officials. […]