U.S. has seen evidence of Syria preparing chemical weapons in Idlib: envoy

"I am very sure that we have very, very good grounds to be making these warnings," said Jim Jeffrey, who was named on Aug. 17 as Secretary of State Mike Pompeo's special adviser on Syria overseeing talks on a political transition in that country. "Any offensive is to us objectionable as a reckless escalation," Jeffrey told a few reporters in his first interview on the situation in Syria since his appointment. "There is lots of evidence that chemical weapons are being prepared." The White House has warned that the United States and its allies would respond "swiftly and vigorously" if government forces used chemical weapons in the widely expected offensive.