Jonathan Kanter, a Big Tech critic and former Paul, Weiss, Rifkind, Wharton & Garrison partner, on Wednesday committed to adopting an aggressive antitrust enforcement regime if confirmed to lead the U.S. Justice Department’s antitrust division.

At a hearing before the Senate Judiciary Committee, Kanter noted that “market realities” have changed in recent years, requiring a shift in focus of antitrust enforcement across a range of industries. One Republican, Sen. Thom Tillis of North Carolina, pledged to support Kanter’s nomination as assistant attorney general and other GOP senators appeared receptive to his approach.