Brockton, Mass., is known as the birthplace of boxing legend Rocky Marciano. But with U.S. Sen. Elizabeth Warren pushing for a $1 billion Native American casino less than 20 miles away, struggling blue-collar Brockton's competing casino bid might not stand a fighting chance. Brockton Mayor William Carpenter slammed Warren's bill on behalf of the Masphee Wampanoag tribe, which would override a federal judge's decision last year to block the tribe's plan for a luxury gaming resort in East Taunton. He says Warren seems to be acting on behalf of special interests instead of people like Brockton's struggling residents.