Mezue ahịrịokwu na-esonụ: Mgbe ntuli aka nke Donald Trump, ihe dị mkpa nke United States banyere Assad adịghị ka ihe dị mkpa nke nchịkwa Obama, na March 2017 United States Ambassador to the United Nations Nikki Haley kwuru na US anaghịzi elekwasị anya na "iwepụ Assad", ma ọnọdụ a gbanwere na mbido nke 2017 Khan Shaykhun chemical agha. Ịgbaso
mwakpo ndị agha nuklia na ebe ụgbọelu ndị Siria na ntuziaka nke Onye isi ala Trump, onye na-ekwuchitere Assad kọwara omume United States dị ka "mmekpa ahụ na-ezighi ezi na mpako" ma kwupụta na mwakpo ndị agha nuklia "adịghị agbanwe usoro dị omimi" nke gọọmentị Syria. Onyeisiala Assad gwakwara Agence France-Presse na ndị agha Syria hapụrụ ngwa agha kemịkal niile ha n'afọ 2013, na ha agaraghị eji ha ma ọ bụrụ na ha ka nwere ụfọdụ, ma kwupụta na mwakpo kemịkal bụ "100 percent fabrication" ejiri mee ihe iji kwado mwakpo ụgbọelu US. N'ọnwa Juun afọ 2017, onyeisiala mba Rọshịa bụ Putin kwuru na "Assad ejighị [ngwá agha kemịkal] mee ihe" nakwa na ọ bụ "ndị chọrọ ịta ya ụta mere mwakpo ahụ". Ndị United Nations na ndị na-enyocha ngwaagha kemịkalụ mba ụwa chọpụtara na mwakpo ahụ bụ ọrụ ọchịchị Assad.