Trump is a Frankenstein’s monster of past presidents’ worst attributes: Andrew Jackson’s rage; Millard Fillmore’s bigotry; James Buchanan’s incompetence and spite; Theodore Roosevelt’s self-aggrandizement; Richard Nixon’s paranoia, insecurity, and indifference to law; and Bill Clinton’s lack of self-control and reflexive dishonesty.

Most of Goldsmith's comparisons are immediately familiar.  We can all see Jackson's anger, TR's braggadocio, and Nixon's paranoia as their defining characteristics.  But Millard Fillmore is more famous for obscurity than bigotry.  Yes, he signed the Fugitive Slave Act of 1850, but he was actually somewhat reluctant about it.  And his enforcement of the Act was more out of duty than prejudice.

A much better exemplar of presidential bigotry would be Andrew Johnson, John Tyler, James Polk, or Woodrow Wilson. (Tyler has the added advantage of having left the party that elected him.)

[h/t Jonathan Adler]

[UPDATE] It occurs to me that Goldsmith may have been referring to Fillmore's later affiliation with the anti-Catholicism of the American Party, better known as the "Know Nothings," who nominated him for president in 1856. But that still seems like an inapt comparison.  Trump has many failings, but, to my knowledge, anti-Catholic bigotry is not among them.