When it comes to most of the thorny issues she’ll be asked to referee on between President Obama and Congress, Loretta Lynch, the woman nominated to be the next attorney general, said she doesn’t yet have a sense for how she’ll come down. Ms. Lynch, who faces a probable vote Thursday in the Judiciary Committee and likely action by the full Senate next month, deflected dozens of questions in 221 pages of written responses to the panel, saying she wasn’t familiar with the fight over documents from the Fast and Furious gun-walking operation, couldn’t talk accurately about major parts of...