Marco Rubio, the ambitious son of Cuban immigrants who reached the United States Senate before his fortieth birthday, has always acted old for his age.

From his days as a political director in Florida for former Republican presidential candidate Bob Dole in his mid-20s, to becoming the youngest speaker of the Florida House in the state's history, Rubio has constantly been underestimated because of his youth. In the forthcoming book, The Rise of Marco Rubio, Washington Post reporter Manuel Roig-Franzia paints a picture of a man who has taken a calculated approach to his rise to power.