> The good news is there isn't a backup.

Recently Charlie Rose [1] interviewed Michael Wolff,[2]

* https://www.youtube.com/watch?v=HlrRr4ljLFM

who just published his fourth book on Trump, and who labelled Trump sui generis:

> Sui generis (/ˌsuːi ˈʒɛnərɪs/ SOO-ee ZHEN-ər-iss,[1] Classical Latin: [ˈsʊ.iː ˈɡɛnɛrɪs]) is a Latin phrase that means "of its/their own kind" or "in a class by itself", therefore "unique".[2] It denotes an exclusion to the larger system an object is in relation to.

* https://en.wikipedia.org/wiki/Sui_generis

A unique personality that happened to come along at a unique time, and who which probably cannot be replicated.

[1] https://en.wikipedia.org/wiki/Charlie_Rose

[2] https://en.wikipedia.org/wiki/Michael_Wolff_(journalist)