One would expect increases in voter registration to occur after Kamala Harris entered the race, but nothing anywhere near this dramatic. Source: New Jersey Advance Voter registration among young Black women took off like a rocket across more than a dozen states after President Joe Biden bowed out of the race against former President Donald Trump, according to data. As Vice President Kamala Harris worked to secure her party’s support in the week after Biden announced his decision, new registration among the group was up more than 175%, according to an analysis from TargetSmart. It compared voter registration to the week of July 21, 2020 to July 21, 2024.