Sen. Marco Rubio is gambling that 2016 is his moment.
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Rubio, a 43-year-old Florida Republican star who was Speaker of the Florida House just six years ago, is expected to announce Monday that he is seeking the GOP nomination for president.

Rubio will be surrounded by family and supporters in Miami as he launches a campaign that, if successful, would complete a meteoric rise that has already drawn comparisons to President Barack Obama.