Senate Judiciary Committee Chairman Chuck Grassley, R-Iowa, formally requested documents related to Judge Brett Kavanaugh’s time serving in the White House Counsel’s Office for President George W. Bush, a request that comes amid a building dispute between Republicans and Democrats over the Supreme Court nominee’s White House records.

In a letter Friday to National Archives staff at the George W. Bush Presidential Library and Museum, Grassley requested all emails sent to or from Kavanaugh and textual records in Kavanaugh’s office files during the time he served as associate counsel and senior associate counsel in the White House.