Bernie Sanders backs Angie Nixon after her stunning Florida primary upset

Sen. Bernie Sanders endorsed Florida Democratic Senate nominee Angie Nixon on Thursday, two days after she stunned the party establishment by defeating heavily funded favorite Alex Vindman. Why it matters: Sanders gives Nixon a prominent national progressive ally as she pivots to a difficult general-election race against Republican Sen. Ashley Moody. Sanders also cast Nixon as a model for the Democratic Party's future. What he's saying: "Angie is proof that organized people can take on the…