Chambers in key swing states like Michigan and Nevada get more competitive.KEY POINTS FROM THIS ARTICLE— In what we expect to be our final pre-election look at the nation’s legislatures, we are shifting our ratings for 7 chambers. We are moving 5 chambers in the Democrats’ direction, while 2 move in the Republicans’ direction.— It’s important not to read too much into the imbalance in these shifts favoring the Democrats. The shifts reflect 2 major changes in the political environment since our last handicapping, which was published in May: the Supreme Court’s decision to overturn...