In the Washington Post, Jennifer Rubin, a conservative columnist and an attorney, describes Yates "giving a tutorial in committee testifying" in which she destroys Republican Senator Cornyn: 

"Sen. John Cornyn (R-Tex.) tried to accuse [Yates] of misconduct in refusing to defend the Trump administration’s travel ban, which was ultimately blocked by multiple courts. Yates reminded him that at her confirmation hearing, Cornyn had asked if she would refuse to carry out an illegal or unconstitutional order. She recalled she had promised him she would indeed refuse. Ouch."