The author is making a distinction between progressive and leftist, and this interpretation may vary from reader to reader, considering in many ways the two views share many similarities. I personally have no issue with the classification, calling his accomplishments progressive or leftist makes little difference to me, but it could be viewed differently by others who may have drawn a line between the two labels. Manchin and AOC rallying behind Walz does appear to lend credence to the idea that he could be a unifying force.
The author is making a distinction between progressive and leftist, and this interpretation may vary from reader to reader, considering in many ways the two views share many similarities. I personally have no issue with the classification, calling his accomplishments progressive or leftist makes little difference to me, but it could be viewed differently by others who may have drawn a line between the two labels. Manchin and AOC rallying behind Walz does appear to lend credence to the idea that he could be a unifying force.