Revealed: CEO at heart of US ports strike made crude attacks on Biden and Democrats

David Adam of USMX made coarse remarks about president and appeared to endorse rightwing conspiracy theory

An executive representing ports where tens of thousands of workers went on strike this week made a series of critical and crude remarks about Joe Biden, tied Kamala Harris to concerns about over-taxation, and appeared to endorse a rightwing conspiracy theory.

David Adam, chairman and chief executive of the United States Maritime Alliance (USMX), attacked prominent Democrats in a string of social media posts uncovered by the Guardian.