If there's one place US President Joe Biden can count on for support from Black voters, it is Toliver's Mane Event barbershop in the South Carolina state capital Columbia. A framed photo on the wall pictures the moment a smiling Biden visited the shop before his turnaround Democratic primary win in 2020. "We think that he's done a wonderful job," says co-owner Christopher Toliver, 53, a viewpoint echoed by customers arriving for early morning appointments at this veritable institution for the city's Black community. Not everyone agrees. A number of polls have shown that Biden is losing ground with the...