In March, researchers at Tufts University announced that they’ve halted releasing statistics from the go-to source of school-level data on student voter registration and turnout — the National Study of Learning, Voting and Engagement. And the key source of student information needed to produce NSLVE reports, the National Student Clearinghouse, pulled out of working on the study going forward, after a more than decade-long partnership.

It’s all part of the fallout from an extraordinary investigation into the study by the Trump administration’s Education Department.

In a press release touting it as a move to “protect” the integrity of U.S. elections, Trump officials said they launched the probe in February to look into unspecified “reports” that NSLVE is in violation of a federal student data privacy law.