Deal With Saudis Paved Way for Syrian Airstrikes
...
A year earlier, King Abdullah had fumed when President Barack Obama called off strikes against the regime of Syria's Bashar al-Assad. This time, the U.S. needed the king's commitment to support a different Syrian missionagainst the extremist group Islamic Stateknowing there was little hope of assembling an Arab front without it.
...
Reaching that agreement, however, took months of behind-the-scenes work by the U.S. and Arab leaders, who agreed on the need to cooperate against Islamic State, but not how or when. The process gave the Saudis leverage to extract a fresh U.S. commitment to beef up training for rebels fighting Mr. Assad, whose demise the Saudis still see as a top priority.
Wary of a repeat of Mr. Obama's earlier reversal, the Saudis and United Arab Emirates decided on a strategy aimed at making it harder for Mr. Obama to change course. "Whatever they ask for, you say 'yes,'" an adviser to the Gulf bloc said of its strategy. "The goal was not to give them any reason to slow down or back out."
...
There were obstacles to overcome before Islamic State's rise became an unlikely catalyst for U.S.-Saudi rapprochement. After Islamic State made startling gains in Iraq, Saudi officials told Mr. Kerry in June that Iraqi leader Nouri al-Maliki, a Shiite with close ties to Iran, needed to go, according to U.S officials. Once that happened, Riyadh would step up its role against Islamic State and work to bring other Gulf states onboard. The Obama administration had come to a similar conclusion and started to maneuver Mr. al-Maliki out of office.
...
http://online.wsj.com/article/SB11230001889343144913904580174351404513216.html
PS: You can read the whole thing behind the paywall by typing the headline into google