The latest polls are fairly tight. Harris momentum does however continue.
Beyond all of that I took the time to read Vance's sustained criticism Trump over the years before he became a born again ultra MAGA.
Vance criticism of Trump is all over the media so I don't need to repeat it. In short, Vance was (and possibly remains) more critical of Trump than I am (if that's possible).
Vance has a lot of insecurities in his closest. His ultra MAGA veneer maybe just a masking strategy.
