Sen. Marsha Blackburn (R., Tenn.) is pressing President Joe Biden for details of the administration’s interactions with the National School Boards Association regarding a letter that called on the FBI to investigate parents as potential domestic terrorists.

In a Tuesday letter to Biden, Blackburn cited reports from the Washington Free Beacon that association officials coordinated with White House staff and the Department of Education in the weeks before the organization sent its letter. In emails to Biden administration staffers, the association cited examples of alleged violence at school board meetings and called on Biden to deploy the FBI to investigate.

On Oct. 4, five days after the association released the letter, the Justice Department formed a task force to address the issue. On Oct. 13, Secretary of Education Miguel Cardona appointed association president Viola Garcia to the National Assessment Governing Board, which sets guidelines for an achievement test used in schools across the country.