"Biden cleaned house, earning over 60 percent of the African-American vote according to exit polls—a dynamic that suggests a familiar challenge ahead for Sanders. In 2016, his insurgent campaign against Sec. Hillary Clinton saw its momentum blunted repeatedly by her overwhelming support among African-Americans. Sanders very well may have won that nomination if he could only have drawn more black support. After licking his wounds, Sanders learned his lesson and did the hard work of establishing more of a sustained presence in black and brown political life. He dramatically diversified his campaign at the top and made inroads with younger, more progressive up-and-coming community leaders and politicians of color who tend to be more open to his ambitious agenda than more moderate, older African-Americans. For some time now, it appeared as though Sanders’ work was paying off. He handily won Latinos and held his own with African-Americans in Nevada, the first truly diverse state to participate in the 2020 primary to date. And until recently, polls showed him surging in South Carolina, even threatening to take the lead. Pundits will have a field day trying to diagnose what went wrong for the 2020 frontrunner in South Carolina. Was it the Clyburn endorsement (which felt dramatic and inevitable at the same time)? The impact of the most prolonged attacks on Sanders by his competitors since the race began? Sanders continues to show strength with black voters under 40, which is more than can be said for Mayor Pete Buttigieg, Sen. Amy Klobuchar and arguably Sen. Elizabeth Warren, who have all garnered almost no support from African-Americans to date."