Complex sentence: Rodriguez lost a primary challenge to Cuellar in the 28th district, which was also vacated, but the redrawing placed Rodriguez' home, along with most of his old base, into the 23rd district.
Split into simpler sentences: Rodriguez lost a primary challenge to Cuellar in the 28th district, which was also vacated. The redrawing placed Rodriguez' home, along with most of his old base, into the 23rd district.