Teachers unions won several big victories in both red and blue states Tuesday, overturning laws that would have eliminated tenure in Idaho and South Dakota, defeating a threat to union political work in California, and ousting a state schools chief in Indiana who sought to fundamentally remake public education, Reuters reports. The night didn’t belong entirely to big labor; advocates of charter schools, which are typically nonunion, scored a win in Georgia and looked likely to prevail in a tough fight in Washington state…