Kamala Harris in front of a pattern of Obama

In the 48 hours after Kamala Harris announced her run for president on July 21, nearly 40,000 people registered to vote on vote.org — 83% of whom were under 35. The groundswell of support from young people, NPR correspondent Tamara Keith recently said, indicates "the kind of enthusiasm they haven't experienced since Obama." But can the Harris campaign harness the energy of young voters in the same way Obama did 16 years ago all the way to victory?