ABC's Kirit Radia reports: In an interview aired this evening Secretary of State Hillary Clinton suggested she is not interested in serving more than four years should President Obama win a second term. Clinton was asked by PBS's Tavis Smiley whether she could "imagine yourself doing all four years and, if asked, doing it for another four years." She replied "No, I really can't." Clinton clarified that she was referring to serving in a second term, saying "the whole eight, I mean, that that would be very challenging. But I, you know, I don't wanna make any predictions sitting here." Later Clinton again ruled out another run for the presidency, something she has maintained for months. She said she was "absolutely not interested." In an interview with ABC's Cynthia McFadden in October, Clinton also ruled out a run for her old Senate seat or for New York governor.