But for the same operational reasons , any u.s. persons who do become terrorists would present a significant counterterrorist challenge even without having any affiliation with al qaeda or some other foreign group .
He was a signatory of an open letter , with hip hop superstar p diddy ( formerly puff daddy ) and soul queen mary j blige , urging people to vote , but he has repeatedly said that he has no official affiliation to obama : " I 'm just a private citizen doing my own thing . "