The statement from the White House acknowledging President Biden's involvement came from press secretary Karine Jean-Pierre, who said President Biden was "certainly familiar with what his son was going to say."
"Ms. Jean-Pierre's statement suggests that the president had some amount of advanced knowledge that Mr. Biden would choose to defy two congressional subpoenas," the letter continued. "Under the relevant section of the criminal code, it is unlawful to 'corruptly ... endeavor to influence, obstruct, or impede the due and proper exercise of the power of inquiry under which any investigation or inquiry is being had by ... any committee of either House or any joint committee of the Congress.'
"Likewise, any person who 'aids, abets, counsels, commands, induces or procures' the commission of a crime is punishable as a principal of the crime."