He will end any Presidential future he might have.
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Rubio has shown that he is not presidential material. He is childish, petulant, and mercurial. He had a terrible attendance record in the senate and has reversed himself on all manner of issues. He’s another politician who just wants the job but not the responsibilities and accountability.
His parents were Cuban nationals when he was born.
He is not a natural born citizen.
He is not eligible to be President.