Romney and Ryan were joined by their families, Romney's all five sons, some grandchildren as well as his wife Ann, who will now travel with her husband through Election Day.
Mrs. Romney did her best to rev up the crowd, many of whom had been standing in the cold Ohio field for hours waiting for the program.
Whose going to win next Tuesday?" she asked, the crowd cheering in response, "Is Ohio going to do it for us?" she said to more roars from the crowd, many of whom dress in the state's Buckeye red.
"This is a man who will not fail," Mrs. Romney said. "This is a man that is going to turn around America and I'm going to be so happy to be by his side."