In its last-ditch attempt to get moderate Syrian opposition groups to the negotiating table, the Obama administration faces the prospect that a no-show wouldn't be such a bad thing. With less than two weeks to go before a long-planned peace conference in Switzerland, the main Western-backed moderate political group seeking to oust Syrian President Bashar Assad has still not decided if it will attend. It's the latest frustration for the U.S. and allies who have spent the last 18 months trying to negotiate a transition of power from Assad to a new, representative government.