Flynn’s communications with Russian Ambassador Sergey Kislyak were interpreted by some senior U.S. officials as an inappropriate and potentially illegal signal to the Kremlin that it could expect a reprieve from sanctions that were being imposed by the Obama administration in late December to punish Russia for its alleged interference in the 2016 election.

Flynn on Wednesday denied that he had discussed sanctions with Kislyak. Asked in an interview whether he had ever done so, he twice said, “No.”…

The emerging details contradict public statements by incoming senior administration officials including Mike Pence, then the vice president-elect. They acknowledged only a handful of text messages and calls exchanged between Flynn and Kislyak late last year and denied that either ever raised the subject of sanctions…

The nature of Flynn’s pre-inauguration message to Kislyak triggered debate among officials in the Obama administration and intelligence agencies over whether Flynn had violated a law against unauthorized citizens interfering in U.S. disputes with foreign governments, according to officials familiar with that debate. Those officials were already alarmed by what they saw as a Russian assault on the U.S. election.