The hundreds of New Yorkers who report for jury duty Monday morning in Manhattan will embark on an experience not found in history books: They will be vetted as jurors for the trial of a former U.S. president. The task won’t be easy. Lawyers for Donald J. Trump and prosecutors with the Manhattan district attorney’s office will narrow the pool to 12 jurors and several alternates. Both sides will try to discern biases that could alter the outcome of the trial‚ posing dozens of questions that...