President Trump’s national security adviser said on Sunday that he had warned his Russian counterpart last week that “there would be absolutely no tolerance for any interference” in the November election, but did not mention that American intelligence officials and a range of private firms had said they already saw evidence of Russian influence operations.
The adviser, Robert C. O’Brien, said on CBS’s “Face the Nation” that he had delivered the warning during a meeting in Geneva on Friday with Nikolai Patrushev, the secretary of Russia’s Security Council. Mr. O’Brien did not disclose what else was discussed, but the meeting comes as the administration is racing a deadline to decide whether to extend the New START nuclear arms control treaty and as it faces pressure to act against Moscow after the poisoning of Aleksei Navalny, the Russian opposition leader.