Looks like the Obama administration got their answer.

Via Asharq Al-Awsat:

Syrian opposition sources have denied that talks have taken place between the US ambassador to Syria, Robert Ford, and leaders of the Islamic Front, one of the largest Islamist opposition factions in Syria.

A source within the Syrian opposition, speaking to Asharq Al-Awsat on condition of anonymity, said: “The Islamic Front received an invitation from the US administration through mediators to discuss the possibility of returning to work under the umbrella of the Free Syrian Army (FSA), but it has not responded yet.” […]

Meanwhile, an official of the Islamic Front’s political bureau, Abdallah Al-Hamawi, denied the reports and said they were “lies, and their objectives were clear, and we will not allow them to cause sedition”.

He added on his Twitter account that the Islamic Front “will not fight the Al-Qaeda organization because it [Islamic Front] was founded to form a link for jihadists”, and that it would not fight a proxy war or cause division between the jihadists.