Since the Syrian uprising began in spring 2011, President Obama has been reluctant to get involved in the violent clashes between the government led by Bashar Assad and the rebel opposition.

Despite this caution, Obama shocked his own national security team by warning Assad in August 2012 that the use of chemical weapons would cross a “red line” and change his calculus toward Syria.

Recommended Stories

Obama sanctions Syrian officials over chemical weapons use

Vladimir Putin warns US against Syria strike in NYT op-ed

Rep. Peter King: Obama has right to attack Syria without Congress’ OK