Using the Justice Department to Investigate Trump's Enemies

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Although the president is the head of the executive branch and selects the attorney general, it has been taboo for a president to direct the department to launch specific investigations since Richard Nixon’s Watergate-era abuses—a taboo that’s especially strong in the case of one’s political enemies, as in the Trump-Clinton case.

The Clinton cases seem more like a more obviously worrisome example of presidential interference to punish a political enemy, but there’s always the chance that there might be bona fide criminal conduct. Where Trump can’t prevent a damaging investigation into himself, he can at least create a fog of confusion.