President Barack Obama is expected to make a renewed U.S. push next week to help Gulf allies create a region-wide defense system to guard against Iranian missiles as he seeks to allay their anxieties over any nuclear deal with Tehran, according to U.S. sources.

The offer could be accompanied by enhanced security commitments, new arms sales and more joint military exercises, U.S. officials say, as Obama tries to reassure Gulf Arab countries that Washington is not abandoning them.

With little more than a week to go before Obama hosts the six-nation Gulf Cooperation Council at the White House and then at Camp David, aides are discussing the options in pre-summit meetings with Arab diplomats. Officials say no final decisions on possible U.S. proposals have been made. […]