“Kamala Harris and Democrats are feverishly working to fortify the ‘blue wall’ states of Wisconsin, Michigan and Pennsylvania, still haunted by Donald Trump’s victories there eight years ago that delivered him the White House and could send him back if he prevails again,” CNN reports. “The November election will test whether the three states will march in lockstep – as they have all but twice over the past half-century – or whether they will choose different candidates, potentially complicating the winning path to 270 electoral votes for Harris or Trump.”