The two Republicans provided no information on the purported whistleblower’s background, or how that person would have knowledge of an alleged conversation with an FBI source. GOP lawmakers have faced Democratic criticism in the past for applying the whistleblower designation to individuals who don’t meet the legal definition.

“Based on the alleged specificity within the document, it would appear that the DOJ and the FBI have enough information to determine the truth and accuracy of the information contained within it. However, it remains unclear what steps, if any, were taken to investigate the matter,” Comer and Grassley wrote on Wednesday to FBI Director Christopher Wray and Attorney General Merrick Garland.

The subpoena compels the FBI to require over any FD-1023 forms — the formal term for records that describe conversations with a confidential human source — from June 2020 that contain the word “Biden.” The forms themselves, regardless of their content, do not independently amount to evidence of wrongdoing.