During his campaign , he debated McCain twice , once in Flagstaff and once in Tucson .
During his campaign , he debated McCain twice , once in the flagstaff , and once in Tucson .
During his campaign , he debated McCain twice , once in the flagstaff , and once in Tucson .
Write a paraphrase for the sentence: During his campaign , he debated McCain twice , once in Flagstaff and once in Tucson . Output: