Complex sentence: Travis County District Attorney Ronnie Earle attempted to keep Perkins as the presiding judge over the prosecution of DeLay, whose lawyers were successful in arguing the judge could not be perceived in public as impartial under the circumstances of Perkins' donations.
Split into simpler sentences: Travis County District Attorney Ronnie Earle attempted to keep Perkins as the presiding judge over the prosecution of Tom DeLay. DeLay's lawyers were successful in arguing the judge could not be perceived in public as impartial under the circumstances of Perkins' donations.