Too many people believe members of the federal bench have already taken sides before they even hear evidence in a case, U.S. District Judge Edmond E. Chang said.“I think there is a misperception generally among the public and even in some segments of the law schools and the profession about what is our guiding principle,” Chang said.Judges, he said, “are just trying to provide equal justice under the law.”He is troubled whenever media reports about court rulings mention which president appointed the …