MSNBC host Chris Matthews, surveying his Florida audience ahead of the final presidential debate, encountered a combative Mitt Romney supporter on Monday night. Their encounter became tense when the supporter suggested that members of Barack Obama’s administration were disingenuous when they claimed the attack in Benghazi in September happened spontaneously during a protest over an insulting YouTube video. “Read a newspaper,” Matthews said. “Everybody knows it’s all about the video. It’s all about the video.”