All Policy Analysis by Simon Henderson

The president should use tomorrow's visit to channel Qatar's diplomatic energies in directions more in line with U.S. regional policy.

Tuesday's meeting in Riyadh between King Salman and Pakistan's top military commander will revive speculation of a secret nuclear agreement to counter any Iranian nuclear threat.

Even if a political timetable can be arranged and President Mansour Hadi can hold on, further destabilization appears inevitable.

The latest shakeup among Saudi decisionmakers will require Washington to work on new relationships in Riyadh and perhaps reconfirm understandings reached at Tuesday's summit.

Riyadh is entering unknown territory with its succession system at a time when threats and distractions have sprung up on multiple fronts.

The length of the meeting and the names of the Saudi officials in attendance will reveal as much as any government communique or briefing on what subjects were discussed.

The apparent collapse of the Yemeni government is a headache for Riyadh and bodes ill for U.S. counterterrorism strategy.

The West should be bracing for a stormy succession battle in the House of Saud.

The death or incapacity of King Abdullah will exacerbate tensions within the royal family over who should replace him.

The Israeli regulator's decision to reopen a natural gas agreement because of a monopoly issue jeopardizes the country's gas export potential and its ability to attract foreign capital, as well as threatening to complicate relations with Jordan, the Palestinian Authority, and Egypt.

The sudden removal of several ministers is most likely a response to popular dissatisfaction with the government's performance at home.

Amid electoral boycotts and continued concerns about ISIS and Iran, King Hamad has reappointed a prime minister whom Washington regards as an impediment to political progress.

While the purpose of multilateral negotiations with Iran is to reduce proliferation concerns, successful talks may in fact accelerate nuclear plans in the Gulf states and Jordan.

A late-night agreement in Riyadh appears to have resolved the diplomatic spat between Qatar and its GCC partners, opening up the possibility of more diplomatic coordination and greater unity.

Will Iran be able to build nuclear weapons? The answer could be determined by the November 24 deadline for talks between Iran and the five permanent members of the U.N. Security Council and Germany (P5+1). The outcome has profound consequences for America and the Middle East. Over the years, Washington

The death of Sultan Qaboos with no clear successor would jeopardize U.S.-Iran diplomatic contacts, the latest of which will be the meeting tomorrow in Muscat between Secretary of State John Kerry and Iranian foreign minister Mohammad Javad Zarif.