Michael Flynn resigned as White House national security adviser late Monday night after he misled Vice President Mike Pence about the pre-inauguration conversations he had with Russia’s U.S. ambassador about the U.S. sanctions imposed on that country. In his resignation letter, Flynn wrote that he apologized to President Trump and Pence for “inadvertently brief[ing] the Vice President Elect and others with incomplete information regarding my phone calls with the Russian Ambassador.” In the weeks before Trump was sworn in as president, Flynn and Russian Ambassador Sergey Kislyak discussed sanctions the same day they were imposed, current and former U.S. officials confirmed to ABC News last week. In an interview with the Washington Post last week, Flynn denied this. Pence also denied the reports in a January interview, based on information Flynn had given him. Here’s what we know about Flynn’s communications with Kislyak and the Trump administration’s handling of the situation: Friday, Nov. 18, 2016 Trump names Flynn as his national security adviser. Sunday, Dec. 25, 2016 Flynn and Kislyak exchanged holiday greetings over texts, according to White House press secretary Sean Spicer. Spicer told reporters in a transition team phone call Jan. 13 that Flynn had texted Kislyak, wishing the Russian ambassador Merry Christmas and Happy New Year. Flynn also said he looked forward to touching base and working with Kislyak, Spicer said. Thursday, Dec. 29, 2016 Firing back at alleged Russian efforts to influence the election, the Obama administration announced it was expelling 35 Russian intelligence operatives from…more detail