The study evaluated all new voter registrations in the 39 states with available data since February 14, 2018—the day of the Parkland shooting—and calculated the change in the share of new registrants who are 18 to 29 years old. Across the country, the share of youth registrants increased by a modest 2.16 percentage points. But in Indiana, Virginia, and New York—home to some of this year’s marquee House and Senate contests—the share of youth registrants increased by 9.87, 10.49, and 10.7 percentage points, respectively. In Pennsylvania—where voters will decide as many as nine competitive congressional races—the share of new registrants who are younger than 30 jumped by a whopping 16.14 percentage points.caveat:
... though there’s no guarantee that many of the new registrants will actually vote. Just under half of all 18-to-29-year-olds were registered to vote in 2014, but less than 20 percent of that population group ended up casting ballots that year.