Authorities found an explosive device Monday in the mailbox of billionaire philanthropist George Soros at his Westchester County, New York estate. Soros was not home at the time, and the investigation has been handed over to the FBI. George Soros has become a target for conservative attacks and is often used as a bogeyman figure for Republican lawmakers and conservative media. President Trump accused protesters at the Kavanaugh confirmation hearings earlier this month of being paid by Soros.