WASHINGTON – The United States is poised to suspend another major weapons shipment to Egypt amid deep divisions within the Obama administration over whether to cut off aid to the military-backed government. The debate mirrors similar disagreements over intervening in Syria, where there are new reports that chemical weapons have been used by the government.

Factions within the administration line up largely along two fronts: those who want the U.S. to take more decisive action to counter widespread violence in both Egypt and Syria, and senior military and some diplomatic leaders who are arguing for moderation.

The lack of a unified position — both within the administration and on Capitol Hill — is giving Obama time and space for his cautious approach. But it also poses a moral question: How far should the United States go to stop violence against civilians when its actions could drag the United States into the war in Syria or damage U.S. relations with Egypt — and undermine the Egypt-Israel peace accord.

The next military weapons shipments for Egypt are scheduled for next month — including 10 Apache helicopters at a cost of about $500 million. Also scheduled for delivery are a number of M1A1 tank kits, including machine guns and other equipment used with the tanks, as well as some used missiles. The missiles, which have been moved and handled, but not yet fired, could be used for spare parts by the Egyptian military or they could be refurbished and fired.

According to senior U.S. officials, however, the administration is expected to delay the delivery of Apache helicopters. That move, which may not come until next week, would be the second major weapons sale put on hold by the U.S. in an effort to pressure the Egyptian military to halt bloodshed and take steps toward a more peaceful transition to democracy.

Defense officials say cutting off aid would threaten key national security agreements and could rattle the peace between Egypt and Israel. But even as officials continue to review aid to Egypt, the U.S. military has continued shipments of thousands of spare parts for American weapons systems used by the Egyptian forces, including armored bulldozers for border security, radars and missiles.