Mr. Nixon violated that when he said to Haldeman and Ehrlichman, “We’ve got to stop this Watergate investigation. With Mr. Trump you have dozens of things that amount to failing to take care that the laws be faithfully executed. For example, in volume two of the Mueller report, the president is very clearly depicted as instructing senior national security officials, senior national intelligence officials and senior legal officials to lie. Those are Trump voters who are going to be displaced, the long-haul truckers who are not going to have a job when self-driving trucks come in. But there are 20 states where unenrolled voters, independent voters, can vote in the Republican primary.
Source: New York Times April 23, 2019 20:47 UTC