In the case of Tillerson, his resignation has the potential to have an even bigger effect than many we have seen, given Trump’s paper-thin support. Some congressional Republicans are unhappy with the direction of his presidency, while his approval ratings have been extremely low. Democrats, who never liked Trump, have only seen their worst fears confirmed as each day of this presidency continues.

What would Tillerson stepping down accomplish? At a minimum, it would be the first time that a major official took a principled stand against the tumult that has been unfolding in the White House, potentially inspiring others to do the same and creating a sense of crisis for Republican power brokers that moves them to apply more pressure on the advisers surrounding the President.