The new American sanctions were announced on Sunday by Nikki R. Haley, the ambassador to the United Nations and the administration’s leading public voice excoriating Russia in recent days. “They will go directly to any sort of companies that were dealing with equipment related to Assad and chemical weapons use,” she said on “Face the Nation” on CBS. “And so I think everyone is going to feel it at this point. I think everyone knows that we sent a strong message, and our hope is that they listen to it.”…

New sanctions on Monday would be the third round enacted by the Trump administration against Russia in the past four weeks. Last month, the administration targeted Russian companies and individuals for intervening in the 2016 election and mounting cyberattacks against Western facilities. It followed that this month with penalties against Mr. Putin’s inner circle, singling out some of Russia’s richest men and top government officials.