A shouting match broke out Friday on Fox News as panelists erupted in rage — and laughter — over an analyst’s refusal to source his claim about Vice President Kamala Harris. Analyst and attorney Clay Travis shouted down host Martha MacCallum and a fellow panelist as he repeatedly insisted Harris had the worst favorability ratings of any vice president. “The more she talks, the more people turn away from her,” Travis exclaimed. “She has the lowest rated vice president approval rating in history.” Want more breaking political news? Click for the latest headlines at Raw Story. “That’s not true,” …