In the wake of national security adviser Michael Flynn’s resignation Monday night, lawmakers from both parties are calling for an investigation into his and other Trump aides’ possible ties to Russia. Flynn famously, and foolishly, accepted a paid trip to Moscow in 2015 to speak at a banquet for the Russian propaganda outlet, RT network. But it’s unlikely a former intelligence officer who is actually working with a foreign government would sit at the same table as his handler to pose for pictures in a tuxedo. It’s evidence of obtuseness, but not influence-peddling.

No, it seems that something else is going on. In the weeks leading up to Flynn’s resignation, more than one Washington insider was commenting on how the story came to light. The fact that the pre-inauguration leak went to White House reporters instead of journalists on the national security beat has raised lots of eyebrows. Yes, Flynn had the conversation with the Russian ambassador, he told Vice President Pence that sanctions were not part of the conversation when they were, and President Trump asked for his resignation. However, the question of who leaked the story of Flynn’s conversation with the Russian ambassador and for what purpose is hardly insignificant.