Plunging global oil prices are both underpinning and threatening the foreign policy objectives of the Obama administration and its allies, who face what leaders assembled here described as a dangerous convergence of international crises. Fueling the uncertainty, said U.S., Arab and European officials meeting at the annual World Economic Forum, was the death Thursday of Saudi Arabia’s monarch, King Abdullah–a central player in global energy policy and the fight against international terrorism. “King Abdullah had a long history of being a brave partner with us and with the world not just in counterterrorism, but in his work on interfaith understanding,” U.S. Secretary of State John Kerry told the conference. “We will miss his wisdom.” Mr. Kerry rallied the world’s business and political elite in Davos to marshal their resources to fight Islamic State and other terrorist organizations that he said posed the […]