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 "excerpt": "Lupe Castillo is an American Republican politician and the 2026 GOP nominee for U.S. House in Illinois's 4th Congressional District, after losing there in 2024 to Chuy Garcia.",
 "snippet": "Lupe Castillo is an American Republican politician and the 2026 GOP nominee for U.S. House in Illinois's 4th Congressional District, after losing there in 2024 to Chuy Garcia.",
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 "markdown": "# Lupe Castillo\n\nLupe Castillo is an American politician and the Republican nominee for U.S. House in Illinois's 4th Congressional District in the 2026 election.<sup>[1](https://castillolupe.com/)</sup> She won the Republican primary on March 17, 2026.<sup>[2](https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf)</sup> She previously ran for the same seat in 2024, losing to Congressman Chuy Garcia.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> She is a former 22nd Ward Republican Committeewoman.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup>\n\n| Fact | Detail |\n| --- | --- |\n| Party | Republican<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> |\n| Current office sought | U.S. House, Illinois 4th District (2026 Republican nominee)<sup>[1](https://castillolupe.com/)</sup> |\n| Previous offices | 22nd Ward Republican Committeewoman<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> |\n\n## Party affiliation\n\nCastillo is a Republican.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> She filed as a Republican candidate for U.S. House in Illinois's 4th District in 2026.<sup>[4](https://www.fec.gov/data/candidate/H4IL04117/)</sup>\n\n## Career\n\nCastillo served as the 22nd Ward Republican Committeewoman in Chicago.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> In 2024 she ran for the U.S. House in Illinois's 4th Congressional District and lost to incumbent Congressman Chuy Garcia by a 40-point margin.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> After Garcia announced he would not run again, Castillo entered the 2026 race as the only Republican running in the March primary.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> She won the Republican nomination in the primary held on March 17, 2026.<sup>[2](https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf)</sup>\n\nOn her campaign website, Castillo describes herself as \"a proud woman, wife, mother, and Conservative neighbor\" and writes, \"As a 43 year resident of Illinois' Congressional 4th District, I know the issues that matter to hardworking everyday Illinois residents, and I will fight for you.\"<sup>[1](https://castillolupe.com/)</sup>\n\n## Electoral history\n\n- **2024** – U.S. House, Illinois 4th District: Castillo lost to incumbent Chuy Garcia by a 40-point margin.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup>\n- **2026** – U.S. House, Illinois 4th District, Republican primary (March 17, 2026): Castillo won the Republican nomination.<sup>[2](https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf)</sup> She will appear on the November 3, 2026, general election ballot.<sup>[2](https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf)</sup>\n\n## Issues specific to Castillo\n\nThe 2026 race in the 4th District drew multiple independent candidates. Mayra Macias, a lifelong Democrat and a field organizer for President Obama's 2012 re-election campaign, announced an independent campaign in December, and Ald. Byron Sigcho Lopez (25th), described by [CBS News](https://www.edgepedia.org/cbs-news) as a democratic socialist in his second term on the [Chicago City Council](https://www.edgepedia.org/chicago-city-council), announced plans for an independent run at the end of January.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> On July 21, 2026, however, the Illinois State Board of Elections ruled that neither Macias nor Sigcho-Lopez had collected enough valid signatures to qualify for the ballot as independent candidates.<sup>[5](https://news.wttw.com/2026/07/21/sigcho-lopez-mac-failed-qualify-4th-district-congressional-race-elections-board)</sup> Castillo will face Patty Garcia (Democrat), Chris Getty (Independent), and Ed Hershey (Working Class Party) in the November 3, 2026, general election.<sup>[5](https://news.wttw.com/2026/07/21/sigcho-lopez-mac-failed-qualify-4th-district-congressional-race-elections-board)</sup>\n\nIn her 2024 campaign, Castillo ran without a campaign website or social media account, according to CBS News.<sup>[3](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)</sup> For the 2026 campaign she has set up a campaign website.<sup>[1](https://castillolupe.com/)</sup>\n\n## Positions and voting record\n\n### Family and community\n\nOn her campaign website, Castillo writes that she is \"striving to bring Pro-family values back to Illinois' 4th Congressional District.\"<sup>[1](https://castillolupe.com/)</sup> She describes herself as \"a dedicated community member, proud wife, and mother.\"<sup>[1](https://castillolupe.com/)</sup>\n\n### Constitution, law enforcement, and military\n\nOn her campaign website, Castillo writes, \"As a 43 year resident of the 4th Congressional District, I stand firm in support of our Constitution, law enforcement, and military, ready to fight for our community's future.\"<sup>[1](https://castillolupe.com/)</sup>\n\n### Campaign theme\n\nCastillo's campaign slogan is \"For the Community, From the Community.\"<sup>[1](https://castillolupe.com/)</sup> On her website she writes, \"I am ready to take back our community.\"<sup>[1](https://castillolupe.com/)</sup>\n\n## References\n\n1. [Lupe Castillo campaign website](https://castillolupe.com/)\n2. [FEC 2026 election dates](https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf)\n3. [What to know about the Illinois 4th Congressional District race, CBS News Chicago](https://www.cbsnews.com/chicago/news/what-to-know-illinois-4th-congressional-district-race/)\n4. [FEC candidate filing, H4IL04117](https://www.fec.gov/data/candidate/H4IL04117/)\n5. [Sigcho lopez mac failed qualify 4th district congressional race elections board (news.wttw.com)](https://news.wttw.com/2026/07/21/sigcho-lopez-mac-failed-qualify-4th-district-congressional-race-elections-board)\n\n---\n*Topic: Encyclopedia › Society and history › Politics and government › Government and public administration › Politicians and government officeholders (biographies) › US candidates for federal and statewide office › Candidates for the US House › Surnames C to D*\n\n*Initially written Sep 27, 2026 · Reviewed: Sep 29, 2026 · Edited: Sep 29, 2026 · Last review: Sep 29, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n",
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 "credit": "\"Lupe Castillo\", Edgepedia (EdgeChat), https://www.edgepedia.org/lupe-castillo. Edgepedia Community License 1.0.",
 "credit_md": "\"[Lupe Castillo](https://www.edgepedia.org/lupe-castillo)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/lupe-castillo](https://www.edgepedia.org/lupe-castillo). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).",
 "credit_html": "\"<a href=\"https://www.edgepedia.org/lupe-castillo\">Lupe Castillo</a>\", Edgepedia (EdgeChat), <a href=\"https://www.edgepedia.org/lupe-castillo\">https://www.edgepedia.org/lupe-castillo</a>. <a href=\"https://www.edgepedia.org/edgepedia/license\">Edgepedia Community License 1.0</a>.",
 "speakable": "Lupe Castillo is an American Republican politician and the 2026 GOP nominee for U.S. House in Illinois's 4th Congressional District, after losing there in 2024 to Chuy Garcia."
}