Age: 53
Occupation: Republican presidential candidate
Nobody predicted that the former Pennsylvania Senator would be the last man standing between Mitt Romney and the Republican presidential nomination. But Santorum has confounded expectations despite running a shoestring campaign whose emphasis on polarizing social issues has left moderate Republicans fretting about his suitability as a standard bearer. The magic may have run out, though: despite 10 victories in the GOP nominating contest, Santorum has fallen far behind Romney in the race to 1,144 delegates.