(CNN) Donald Trump has been president for 110 days. In that time, he has fired an acting attorney general, his national security adviser, dozens of federal prosecutors, including one who was investigating him, and, on Tuesday night, the director of the FBI, James Comey.

While each decision has threatened to kick off a crisis -- one could argue that many Americans are now in a perpetual state of minor alarm -- the decision to sack Comey landed differently.

So what did Trump, who is nothing if not savvy about how the press and public will react to his every utterance, think was going to happen? Because this is surely not how he planned his Wednesday. Based on what we know about his decision-making process, Trump appears to have made four fundamental miscalculations.

1. He thought Democrats would pull their punches

It's no secret that most Democrats, especially Clinton supporters and allies, are not exactly Comey superfans. Many of them, including Clinton herself , believe that she would be president today if he had not delivered his now-infamous letter to Congress on October 28, 2016.

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