The state GOP accused O'Donnell and the Tea Party Express of violating FEC rules that restrict coordination between candidates and outside political organizations.
The complaint alleged that the Tea Party Express solicited donors to contribute to O'Donnell and that O'Donnell and the group worked jointly on advertising, breaching federal rules.
In a post on her Twitter account Thursday, O'Donnell said the FEC had dismissed the complaint, which she described as frivolous and politically motivated. O'Donnell's campaign lawyer confirmed that the complaint had been dismissed.
