The LinkedIn co-founder who told a panel of billionaires he wished former president Donald Trump was an “actual martyr” days before Saturday’s assassination attempt, is a dark money donor who has contributed tens of millions to Democratic political candidates. Reid Hoffman, 56, is among the big money supporters of numerous political action committees and non-profits that contribute to progressive and left-leaning political candidates and causes, according to publicly available FEC data. He is a backer of the Hopewell Fund, a non-profit which is managed by Arabella Advisors, described as “a secretive dark money juggernaut” which spent more than $1 billion...