WASHINGTON - Rep. Loretta Sanchez said Wednesday she is quitting the Congressional Hispanic Caucus, citing opposition to the chairmanship of fellow California Democratic Rep. Joe BacaIt was the latest development in a long-running dispute that has pitted Sanchez and other, mostly female, caucus members against Baca and his supporters. Sanchez released a statement alleging a "violation of election rules" when Baca was picked as chairman in November. "Today, I resign from the Congressional Hispanic Caucus, chaired by Mr. Baca," her statement said. "I will continue to be a strong and vocal advocate for the Hispanic community." Baca disputed Sanchez's allegation....