Carter's time in office was almost 50 years ago, and his family has long since receded out of the spotlight. There was a time, though, when his daughter Amy Carter was a major political activist.

Since winning 'American Idol' last May, Abi Carter has continued making her musical mark with a debut album and tour.

Carter wore a cardigan for a White House address, urging Americans to conserve energy by turning down their thermostats. Amy, the youngest of four children, attended District of Columbia public ...