Obama arrives in Saudi Arabia amid rift between Riyadh, Washington

US President Barack Obama arrived Wednesday in Riyadh for a series of meetings with Saudi leaders aimed at reducing the tensions between the two countries and increasing cooperation in the war against terror.
On Thursday, along with Secretary of State John Kerry and Secretary of Defense Ashton Carter, Obama will participate in a summit with the leaders of the six Gulf Cooperation Council member states.
The summit's agenda will include three main topics: increased participation by Gulf states in the global war against Islamic terror, especially ISIS; a US attempt to present the nuclear deal with Iran as an established fact, and encourage talks and reconciliation between Gulf states and Iran; and a process to use the cease-fires in Syria and Yemen to put Saudi Arabia in a stronger political position, with the blessing of Washington and Moscow, to pave the way for a reconciliation with Iran.
In a meeting with Kerry, the GCC foreign ministers are expected to challenge the feasibility of talks with Iran considering the hard line of Iran's Revolutionary Guard and Tehran's continued arming of the Houthi rebels despite its commitment to stop doing so.