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President Trump made some promises during the 2016 campaign: He would release his tax returns, "build the wall," "drain the swamp," protect Medicare and Social Security, and champion law and order, to name a few.

Like all presidents, he has been pretty selective about which campaign promises merit follow-through. The "wall", for example, was worth shutting down the government and sparking a constitutional crisis; his tax returns were deemed worthy of going to court and threatening a constitutional showdown to keep hidden. One of the "promises" he has tried to keep, according to Special Counsel Robert Mueller's report, is "lock her up," his enduring campaign chant about 2016 rival Hillary Clinton.

Mueller's report "brimmed with examples of Mr. Trump seeking to protect himself from the investigation," The New York Times reports, but it also shows at least three instances of him "trying to wield the power of law enforcement to target a political rival, a step that no president since Richard M. Nixon is known to have taken." As with many potential crimes Mueller records, Trump's orders or suggestions to prosecute Clinton were apparently ignored or redirected by former Attorney General Jeff Sessions and former White House Counsel Don McGahn.

Still, Trump's attempt to target Clinton "reeks of a typical practice in authoritarian regimes where whoever attains power, they don't just take over power peacefully, but they punish and jail their opponents," political historian and professor Matthew Dallek tells the Times. It appears from Mueller's report that Trump, encouraged by his Fox News allies, didn't appreciate the difference between political self-preservation and weaponizing the law enforcement tools he seems to think work for him, adds Duke University law professor Samuel W. Buell. "All of his demands fit into a picture that he believes the apparatus is mine"

You can read the details of Trump's attempts to "lock her up" in Mueller's report and at The New York Times.