McCarthy Plans to Leave Congress, Offers Support for Trump in 2024 Bid
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McCarthy announcing he'll leave Congress at end of year
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Gives first TV interview since announcement to CBS' Robert Costa
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Offers support for Trump's 2024 bid, believes he'll be nominee and beat Biden
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Says he'd be willing to serve in Trump cabinet if he's best person for the job
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Preview of interview to air Sunday on "CBS News Sunday Morning"