Jacquelyn Martin, AP
WASHINGTON — At the heart of President Barack Obama's quandary over the Islamic State militants is their haven in Syria.
The president may continue helping Iraqi forces try to reverse the group's land grabs in northern Iraq by providing more arms and American military advisers and by using U.S. warplanes to support Iraqi ground operations. On Friday the Pentagon announced that U.S. warplanes made three more airstrikes against Islamic State targets near the Mosul Dam, including a machine gun position that was firing on Iraqi forces.
But what if the militants pull back, even partially, into Syria and regroup, as Defense Secretary Chuck Hagel on Thursday predicted they would, followed by a renewed offensive?
"In a sense, you're just sort of back to where you were" before they swept into Iraq, said Robert Ford, a former U.S. ambassador to Syria who quit in February in disillusionment over Obama's unwillingness to arm moderate Syrian rebels.
"I don't see how you can contain the Islamic State over the medium term if you don't address their base of operations in Syria," he said in an interview before an intensified round of U.S. airstrikes this week helped Kurdish and Iraqi forces recapture a Tigris River dam near Mosul that had fallen under control of Islamic State militants.
On the other hand, Obama has been leery of getting drawn into the Syrian civil war, which began in 2011.
Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, said Thursday that the Islamic State militants can be contained only so long, and that at some point their Syrian sanctuary will have to be dealt with.
"Can they be defeated without addressing that part of their organization which resides in Syria? The answer is no," he told a Pentagon press conference where Hagel called the group a dire threat that requires an international, not just an American, response.
"That (sanctuary) will have to be addressed on both sides of what is essentially at this point a nonexistent border," Dempsey added, referring to the militants' dismantlement of any semblance of control of the border with Iraq. "And that will come when we have a coalition in the region that takes on the task of defeating ISIS over time," he said, using an alternate acronym for the group. "ISIS will only truly be defeated when it's rejected by the 20 million disenfranchised Sunni that happen to reside between Damascus and Baghdad."
More immediately perhaps, Obama faces choices in Iraq, whose sectarian divisions and political dysfunction created the opening that allowed Islamic State fighters to sweep across northern Iraq in June almost unopposed. They captured U.S.-supplied weapons that Iraqi forces left behind when they fled without a fight.
Among his options:
—Sending more troops to Baghdad to strengthen security for the U.S. Embassy, as requested by the State Department. Officials said the number under consideration is fewer than 300. They would be in addition to the several hundred U.S. troops already in the capital to help protect U.S. facilities and personnel.
—Speeding up the arming of Iraqi and Kurdish forces. The administration has been supplying Iraqi government forces with Hellfire missiles, small arms and ammunition, but critics say the pace has been too slow. The administration has been reluctant to openly arm the Kurds, since their militia, known as the peshmerga, is a semi-autonomous force seen in Baghdad as a threat to central government authority.
—Increasing the number and expanding the role of the dozens of U.S. military advisers who are in Baghdad and the Kurdish capital of Irbil to coordinate with Iraqi forces. They could be given more direct roles in assisting the Iraqis on the ground by embedding with Iraqi or Kurdish units in the field or scouting targets for U.S. airstrikes.
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