Preparations to punish Russia anew for its support of Syrian President Bashar al-Assad's government over an alleged chemical weapons attack in Syria caused consternation at the White House. Haley had said on CBS News's "Face the Nation" that sanctions on Russian companies behind the equipment related to Assad's alleged chemical weapons attack would be announced Monday by Treasury Secretary Steven Mnuchin.

But Trump conferred with his national security advisers later Sunday and told them he was upset the sanctions were being officially rolled out because he was not yet comfortable executing them, according to several people familiar with the plan.