Why the U.S. Congress is reluctant on Syria

"Ironically, the leading voices opposing a bigger U.S. role in Syria come from the base of the Republican party, the same one that had authorized two wars during the George W. Bush Presidency. Times have changed however, and the Republican base has been dominated by the Tea Party movement, which is more isolationist in interpreting the U.S. role in the region, and has been attracting some Islamophobic figures such as Pamela Geller.
Without the Obama administration offering Congress a detailed roadmap about arming, and unless the opposition with new members such as Michel Kilo expand outreach and offer assurances to Syria’s minorities, the U.S. efforts to arm might remain futile, and Syria’s protracted conflict will continue its trajectory towards more extremism and bloodshed."