John F Kennedy's grandson Jack Schlossberg is running for the US House next year, announcing that he's seeking a key New York seat set to be vacated by longtime Democratic Representative Jerry Nadler.

"This district should have a representative who can harness the creativity, energy and drive of this district and translate that into political power in Washington," Schlossberg said in a campaign video posted on social media late on Tuesday.

In an email to supporters, Schlossberg, a Democrat, said that his campaign will officially launch on Wednesday.

Schlossberg has drummed up a large following on social media with frequent posts weighing in on national issues, including taking aim at his cousin, Health Secretary Robert F Kennedy Jr.

Last month, he posted on Instagram an image of a Hall

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