APNewsBreak: Rubio book says he almost quit race

Sen. Marco Rubio was on the verge of dropping out of the 2010 race for Senate, convinced that then-Gov. Charlie Crist's popularity, power and money would be too much to overcome in a Republican primary. He was also afraid any future political ambitions would be crushed by Crist's supporters, Rubio wrote in his autobiography to be released next week.