FILE -- Former Vice President Joe Biden, right, and Sen. Bernie Sanders (I-Vt.) during the Democratic presidential debate at the Gaillard Center in Charleston, S.C., Feb. 25, 2020. Some candidates try to soften their image to broaden their appeal. This one, not so much, but is there a "real" Bernie the public doesn't get to see? (Erin Schaff/The New York Times)