In the halls of Congress, Sen. John Kennedy has long been known as the master of the excruciatingly folksy one-liner. His profile off Capitol Hill, however, has recently exploded — thanks to an increasing tempo of Fox News hits, a bestselling book and a growing TikTok following.

The 74-year-old Louisianan is putting his burgeoning notoriety to work for his Senate Republican colleagues, criss-crossing the country for a series of surprisingly successful events where he’s dropping his trademark bons mots, fielding questions about a future presidential bid and discussing “Margaret” — the exercise machine sitting in his carport that is named after…

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