Sen. John Fetterman is calling his own party's growing embrace of socialism "lunacy" after a CBS News poll found nearly six in ten Democratic voters view the ideology favorably, and only a third have anything good to say about capitalism. Fetterman, the Pennsylvania Democrat who has made a habit of breaking publicly with his party's progressive wing, posted on X on August 16 with a screenshot of the poll results and a blunt verdict. USA TODAY re…