Charles Cooper, the attorney defending a federal challenge to Proposition 8, came to San Francisco to deliver his closing argument on same-sex marriage Wednesday. But Chief Judge Vaughn Walker made it feel much more like a cross-examination.

Walker closely questioned Cooper about his trial presentation, including why his side called only one witness to testify about the institution of marriage. Where Cooper’s counterpart, Theodore Olson of Gibson Dunn & Crutcher, was able to deploy lofty rhetoric with less interruption, Cooper was stuck parrying Walker for about two hours.