People are making too much of the “unmasking” of General Michael Flynn, which may have been entirely justified – but what was almost certainly illegal was the leak to the Washington Post of the information from those unmasked calls.
The purpose here is not to debate the unmasking. I’ll just merely quote a prominent Flynn defender, former ace federal prosecutor Andrew McCarthy of National Review: “There is nothing wrong with President Obama’s knowing about a counterintelligence investigation. In fact, if the FBI truly believed a candidate for the presidency was in an espionage conspiracy with the Kremlin, there would be something profoundly wrong if the president were not kept informed. It would be expected that the president would give his subordinates direction.”