After a cacophonous two weeks of political news, a new sound has begun to emerge from Washington: the word “impeachment.” …
In a perfect world, we’d have data on hundreds of presidents, a few dozen of whom had been impeached. That would let us statistically identify the various factors that made a president more or less likely to survive the process. In the real world, the best we can do is make some educated guesses. Based on the precedents we have available — and our overall knowledge of the American political system — I would expect the following factors to be important in determining a president’s likelihood of removal or resignation: CONT.
Nate Silver, FiveThirtyEight