Swift does not plan to resign, the adviser said.
In April, Swift became Massachusetts' first female chief executive, and, at 36, the nation's youngest, succeeding Paul Cellucci when he became ambassador to Canada.
Up until recently, she had said she was undaunted by a challenge from Romney, who has never held elected office.
Romney planned to announce his decision to run later Tuesday, after a meeting with supporters, according to a friend, who spoke on condition of anonymity.
Well if she does drop out, at least we'll know she wasn't totally STOOPID!! Now we'll have to really get to know Mitt and get behind him!!