U.S. Supreme Court nominee Brett Kavanaugh on Thursday denied having any recollection of conversations of any kind with members of a New York law firm that has represented President Donald Trump.

U.S. Sen. Kamala Harris late Wednesday pressed Kavanaugh about whether he had ever spoken with anyone at the New York-based law firm Kasowitz, Benson & Torres regarding Robert Mueller III, the special counsel leading the investigation of Russia’s interference in the 2016 presidential election.