Woman accuses U.S. candidate Cain of groping

NEW YORK (Reuters) - A woman accused U.S. Republican presidential hopeful Herman Cain on Monday of reaching under her skirt in 1997, adding to sexual harassment allegations that are threatening to derail his campaign.

Cain, a former pizza company executive, has led many opinion polls in the race to be the Republican nominee to face President Barack Obama, a Democrat, in next year's election.