Is HTS undermining Syrian opposition to Assad?

Russia and the Assad regime say Syrian opposition fighters in Idlib are behind a suspected chemical attack. The alliance of Turkish-backed rebels there deny the allegations, saying the regime is creating a pretext for an offensive. But Idlib's most powerful rebel group has stayed silent: Hayat Tahrir al Sham. Guests: Yahya al Aridi Spokesman for the Syrian Negotiation Commission Fadel Abdul Ghany Chairman and founder of the Syrian Network for Human Rights Kevork Almassian Founder of Syriana Analysis