Most of the California tribes who have weighed in on Proposition 27 are against it. They’re worried about language tucked away in the measure that could potentially undermine tribal sovereignty. But at least one tribal chair says it's a way to support financially disadvantaged tribes that don't own big casinos.Reporters: Guy Marzorati, KQED and Nicole Nixon, CapRadioCalifornia K-12 students’ academic progress has plunged during the pandemic. Math is the worst decline, with the percentage of students who are proficient or better dropping seven percentage points statewide. Reporter: Julia McEvoy, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices