Nina Jankowicz, the former face of the short-lived Disinformation Governance Board, revealed to Congress that the Department of Homeland Security was intentionally opaque in the face of overwhelming criticism that led to the board’s collapse. Jankowicz spoke to lawmakers during a deposition about the department’s internal decisions to address widespread concerns about the floundering board. The deposition took place last April, but after it was broached during a hearing this week, House...