In a surprise, Joe Biden’s pick of Sen. Kamala Harris, the first black woman on a presidential ticket, has divided the black vote in a potentially damaging way.

In the latest Rasmussen Reports survey, one of the first since Biden chose Harris, a third of likely voters who were black said they are “less likely” to vote for the Democratic ticket, a third said they were “more likely” to back it, and about a third said it will either have no impact on their choice or weren’t sure.