Black men have been a focus for Harris and her allies long before Obama’s recent challenge The Associated PressObama sends stark warning message to Democrats The HillHow Barack Obama riles Donald Trump on Harris’ campaign trail MSNBCBarack Obama Laughs at Trump Adult-Diaper Joke as Trump Proves He’s a 78-Year-Old Baby Vanity FairObama, in blunt terms, tells Black men to get over their reluctance to support Harris NPR