A defiant Herman Cain has said he will not drop his bid for the Republican presidential nomination in the face of allegations of inappropriate sexual behaviour.
"Ain't gonna' happen," Mr Cain said at a news conference a day after a fourth woman accused him of unwanted sexual advances.
"We will get through this," he added, trying to steady a campaign rocked by the controversy over the past 10 days.
Mr Cain denied again that he had ever behaved inappropriately and said the alleged incidents "simply didn't happen".
He said he would be willing to take a lie detector test if he had a good reason.
Earlier, Mr Cain sought to undercut the credibility of the latest woman whose accusations are threatening his Republican presidential campaign.
His chief rival, Mitt Romney, called the allegations "particularly disturbing".
Meanwhile, another name confronted Mr Cain as well, when one of his two original accusers was identified publicly by news organisations as Karen Kraushaar, now a spokeswoman in the Treasury Department's office of the inspector general for tax administration.