Analysis | Robert Mercer: billionaire Breitbart backer and Republican power broker who gambled on Donald Trump
Robert Mercer, who reportedly has an abiding hatred of the Clintons, was a long-time patron of Stephen Bannon – but publicly split with him after his criticism of Trump’s family surfaced this month in Michael Wolff’s book ‘Fire and Fury’

He is a reclusive hedge fund billionaire who made a fortune using complicated algorithms to bet on things other people could not see.
One of his gambles was on Donald Trump.
And his backing of the long-shot presidential candidate has made Robert “Bob” Mercer, the former co-CEO of Renaissance Technologies, the top power broker in Republican politics today.
The Mercer family is not nearly as well known as the industrialist Koch brothers or the Las Vegas casino magnate Sheldon Adelson when it comes to supporting right-wing causes in the United States.
And they are more than happy to keep it that way.
Mercer, 71, who worked as a computer scientist at IBM before joining Long Island-based Renaissance Technologies, has always shunned the limelight.