Senate Republicans on Wednesday grilled President Joe Biden’s nominee to head the Bureau of Alcohol, Tobacco, Firearms, and Explosives for past statements he made while an advocate for major gun control organizations.

David Chipman, a two-decade ATF veteran before retiring from the agency in 2012, testified before the Senate Judiciary Committee, along with three other Biden Justice Department nominees, in an effort by the Democratic-controlled committee to hasten the confirmation process.