After 32-year incumbent Kika de la Garza announced his retirement, Hinojosa won a five-way primary for the seat by only 588 votes.
Rubén Darío | Ruben Studdard | Rubén Sierra | Rubén Blades | Ruben Blades | Rubén Olivares | Rubén Darío Paredes | Rubén Fuentes | Ruben Brown | Rubén Berríos | Ruben Rausing | Ruben and the Jets | Rubén Amaro, Sr. | Pedro Ruben Decima | Maria Hinojosa | Cruising with Ruben & the Jets | Rubén Zamora | Ruben Vardanian | Rubén Tejada | Rubén Sanz | Ruben Sanz | Ruben Santiago-Hudson | Rubén Rivera | Rubén Ortiz Torres | Ruben Ortiz Torres | Rubén Magnano | Ruben Kruger | Ruben Hinojosa | Rubén Amaro, Jr. | Ruben Amaro |
Ordered by the justices to remedy this situation, a federal panel on August 4 adjusted the lines of the 23rd and four other districts — the 28th (represented by Democrat Henry Cuellar), 25th (Democrat Lloyd Doggett), 15th (Democrat Ruben Hinojosa) and 21st (Republican Lamar S. Smith) — all of which held new primary elections on November 7.