Go here for more of Patrick Poole on Gen. Flynn's travails. The short version: the FBI is calling their interview with him "cooperative" and "truthful," and evidence mounts that he will face no legal jeopardy. The Trump organization's supposed cozy relationship with Russian intelligence during the election months also continues to elude; still no signs of collusion between Trump's people and the Russians.
This whole thing is an embarrassing own-goal for the Trump administration, but it sure looks very far from the impeachable offense the Left is hoping for.
It is, however, more data in the ongoing "media==Democrats with bylines" story.