“It is a disgraceful attempt to mislead voters and undermine our democracy”, she said.
“I will not be distracted. I will continue my campaign in every county, meeting people and making the case for a hopeful, inclusive presidency.”
She added: “If you see this video, do not share it – report it, the surest reply to lies is to vote.”
Connolly’s campaign team said they have reported the video to the social media platforms it appeared on.
They have requested it be removed immediately and clearly listed as fake.