Contra Williamson, today’s behavior by the Trump administration does seem uniquely irresponsible. Trump’s behavior does not seem based on ignorance, but something even more disconcerting. Last year, I speculated that Trump would engage in “omnibalancing”: “My fear is that the Trump White House will choose to tighten its relationship with foreign adversaries because they are viewed as less immediately threatening than either Congress or the special prosecutor.” Twelve months later, Congress has become very docile, but the special prosecutor has not.

Equally important, many Trump supporters have made the same call: better to side with the Russians than with fellow Americans of a different political persuasion…