Joaquin Castro to Seek Reelection in November
The San Antonio incumbent continues his campaign as the November 2026 congressional elections approach.
Updated on Oct. 15, 2026 in Cancer
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U.S. Representative Joaquin Castro is campaigning for reelection to represent the 20th Congressional District in the November 2026 midterm elections. Early voting for the race is scheduled to begin on Monday, October 19, 2026.
Why it matters
Castro aims to help the Democratic Party secure control of the House of Representatives, which would allow him to chair the Subcommittee on the Western Hemisphere. He also seeks to establish a special commission to investigate the actions of ICE.
Castro, who was first elected to the district in 2013, undergoes monthly medical treatment at the Mays Cancer Center following a 2022 diagnosis of neuroendocrine cancer. He is running against Republican challenger Edgardo Báez.
The players
Joaquin Castro
He is the U.S. Representative for Texas' 20th Congressional District and a member of the House Foreign Affairs and Intelligence committees.
Edgardo Báez
He is the Republican candidate challenging Joaquin Castro for the seat representing Texas' 20th Congressional District.
The details
Castro performs constituent services such as securing railroad quiet zones and assisting with international travel for residents of his district. He maintains a focus on influencing federal immigration policy and investigating agency actions while serving on the House Foreign Affairs and Intelligence committees.
Timeline
2002: Castro first ran for the Texas 125th House district seat.
2013: Castro began representing Texas' 20th Congressional District.
2022: Castro received a neuroendocrine cancer diagnosis.
Monday, October 19, 2026: Early voting for the election begins.
November 2026: The midterm congressional elections take place.
Health Landscape
Castro continues to balance his ongoing treatment for neuroendocrine cancer with his legislative duties and campaign travel. His ability to maintain a full schedule at the Mays Cancer Center while managing national responsibilities highlights the evolving realities of health management for elected officials.
The ongoing medical care of Representative Castro serves as a local example for residents managing chronic diagnoses like neuroendocrine cancer. His reliance on regional facilities like the Mays Cancer Center emphasizes the importance of local access to specialized oncological care.
The takeaway
The election reflects a pivotal moment for regional immigration policy and potential shifts in congressional leadership. Voters in the 20th Congressional District will decide whether to maintain the current representation as the party pursues a broader legislative agenda.
What happens next
Early voting for the congressional election begins on Monday, October 19, 2026, followed by the general election in November 2026.
Further reading
For more information on local health resources and support, visit the San Antonio Cancer section.
Source note: This article includes information reported by Texas Public Radio.
Live Poll
Is the federal approach to managing immigration and border detention centers moving in the right direction?
