The Turing Pharmaceuticals CEO became infamous for raising the price of a drug used to treat HIV from $13.50 to $750 per pill. Given his profiteering and penchant for pulling faces, you might expect he and Trump share some core values.
We can't necessarily trust his endorsement, though, given that he's also allegedly applied to intern for Bernie Sanders.
If Shkreli is being genuine, the feeling's not mutual. Trump called him a "spoiled brat" at a press conference last year. Clinton is not a fan of his either.
Finally, something all the presidential candidates agree on.