Complex sentence: After the 2000 census, the Republican-controlled state legislature significantly altered Mascara's district, which was renumbered the 18th and made much friendlier to Republicans, even though there were 70,000 more registered Democrats than Republicans.
Split into simpler sentences: After the 2000 census, the Republican-controlled state legislature significantly altered Mascara's district. It was renumbered the 18th and made much friendlier to Republicans, even though there were 70,000 more registered Democrats than Republicans.