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1/19: Sarah Palin endorses Donald Trump; "Carpool Karaoke" gets a fresh look

Sarah Palin endorsed Donald Trump on Tuesday, a blow to Senator Ted Cruz's bid to consolidate Tea Party support in Iowa; The Ricardos and the Mertzes may have invented carpool karaoke in a 1955 Pontiac on the show "I Love Lucy", but James Corden has taken it to the next level on "The Late Late Show."
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