National security advisor Michael Flynn resigned Monday night after it was revealed that he discussed U.S. policy with Russian ambassador Sergey Kislyak in private. In the month leading up to Trump’s inauguration, Flynn spoke with Kislyak about U.S. sanctions against Russia, assuring him that things would be different once Obama was out of the picture. However, this didn’t stop Flynn from claiming otherwise – twice – in a recent interview. With Russia knowing that Flynn was lying about this conversation, the retired lieutenant general made himself vulnerable to potential blackmail. Further troubling is the fact that Vice President Mike Pence believes he was lied to by Flynn about the subject of his conversation with Kislyak. Pence defended Flynn against such accusations on a number of occasions.…