AP Top News at 7:42 a.m. EST

CHARLESTON, S.C. (AP) ? Under duress two days before the pivotal South Carolina primary, Republican front-runner Mitt Romney acknowledges he has part of his millions invested in the Cayman Islands, although his aides say he never used the location as a tax haven. Neither Romney nor his campaign are providing details, including how much he has invested there, or why, or if any of his money is invested elsewhere outside the United States.

Obama, GOP back in tussle over oil pipeline