In his first 100 days, Joe Biden has redefined what it means to run a progressive presidency. To those paying attention, his radicalism was clear from the start.In a primary full of socialists, President Joe Biden clinched the Democratic nomination and rode his way to the White House on the appearance of a supposed moderate, a pragmatist who promised an American “return to normalcy” in a 21st-century digital version of the early front-porch campaigns.To those paying attention, however, Biden’s radicalism was clear from the start, with normal nowhere in sight. He ran on a platform cloaked in centrism only by...