After hearing about Biden’s comments on working with multiple segregationists, 41 percent of likely primary voters said it would make no difference to them and 29 percent said they would be more likely to vote for him. Just 18 percent said they would be less likely to vote for him. The numbers were about the same for black voters: 30 percent said they would be more likely to vote for Biden, 20 percent said less likely and 27 percent said it made no difference.

Morning Consult’s weekly tracking poll of the Democratic primary, conducted last Monday through Sunday, shows Biden leading the field with 38 percent support, identical to his share of the vote the week prior.

It’s the latest data point suggesting that Biden’s candidacy might be more durable than presumed — and that his campaign might have a more accurate feel for the mood and composition of the Democratic electorate than many of his rivals and critics.