An array of White House aides, playing the role of various senators on the Judiciary Committee, quizzed Kavanaugh last week about his sex life and other personal matters in an attempt to prepare him for a hearing that would inevitably be uncomfortable.

In his answers during the practice runs, aides said, Kavanaugh condemned sexual assault and carefully avoided seeming to discredit Christine Blasey Ford, a psychology professor in Northern California who has accused the nominee of pinning her to a bed, groping her and putting his hand over her mouth to stifle her screams as he tried to take off her clothes at a drunken high school party in the early 1980s.

But Kavanaugh grew frustrated when it came to questions that dug into his private life, particularly his drinking habits and his sexual proclivities, according to three people familiar with the preparations, who requested anonymity to discuss internal deliberations. He declined to answer some questions altogether, saying they were too personal, these people said.

“I’m not going to answer that,” Kavanaugh said at one point according to a senior White House official, who said that the questions were designed to go over the line and that he struck the right tone.