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Kinzinger told Karl on \"This Week with George Stephanopoulos\" in August that he supported issuing subpoenas to anyone -- including House Minority Leader Kevin McCarthy -- who has information about the Jan. 6 attack on the Capitol and what action Trump took. As that committee continues its investigation, with the only other Republican serving on it being Rep. Liz Cheney, R-Wyo., a full House vote last week found Trump ally Steve Bannon in contempt for failing to comply with such a subpoena.

Despite the backlash from House GOP leadership, Kinzinger didn't rule out running for another political office in Friday's announcement.

\"I want to make it clear,\" Kinzinger said. \"This isn't the end of my political future, but the beginning.\"

His current House term is set to end on Jan. 3, 2023.

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