Bob Mercer, a prominent Trump backer, leaving hedge fund

Republican mega-donor Robert Mercer, a billionaire with close ties to President Donald Trump, is stepping down from his position as chief executive officer of the New York investment firm Renaissance Technologies. The 71-year-old Mercer is also selling his personal stake in the pro-Trump website Breitbart News to his daughters.

Mercer Hedge Fund Tax Dispute Moves to IRS Appeals Office

A tax dispute involving Renaissance Technologies, the hedge fund firm whose co-chief executive officer is a prominent backer of President Donald Trump, is advancing to a new phase. Members of the Internal Revenue Service's Office of Appeals are scheduled to meet with lawyers for Renaissance in New York on Nov. 7, according to a person with knowledge of the matter.