It is impossible to write a surprising book about Donald Trump, but you can’t fault people for trying. Mary Trump writes that her uncle lived an “institutionalized” life, but was plainly never loved by his parents. John Bolton writes that the president is incapable of grasping what’s best for the national interest. Both authors reach familiar conclusions with (somewhat juicy) new details. We’ll take it.  Guest: Washington Post reporter Shane Harris. Slate Plus members get bonus segments and ad-free podcast feeds. Sign up now. Learn more about your ad choices. Visit megaphone.fm/adchoices