Among the tough congressional and legislative battles are those involving Democratic Rep. Loretta Sanchez in Orange County and GOP Rep. Mary Bono Mack in her Palm Springs district.The embattled incumbents in California congressional and legislative districts sweating out the ballot counting Tuesday night included Democratic Rep. Loretta Sanchez, who in preliminary returns was pulling ahead of wth Republican Assemblyman Van Tran for a central Orange County seat, and Republican Rep.