MOSCOW—Russia plans to expand its blacklist of Americans in retribution for new U.S. sanctions and could take additional steps to escalate a growing standoff between Russia and the West, a top Russian diplomat said Friday.
President Donald Trump’s administration introduced its first round of sanctions against Russia this week for Moscow’s meddling in the 2016 presidential election and hacking into critical U.S. infrastructure like power grids. Washington has also backed growing European criticism of the Kremlin for its alleged...