Volunteers gathered in a banquet room at a Brazilian steakhouse the night before the rally for a training session organized by the Trump campaign and RNC. It was one of more than 1,000 such sessions nationwide last week.

Volunteers gathered in a banquet room at a Brazilian steakhouse the night before the rally for a training session organized by the Trump campaign and RNC. It was one of more than 1,000 such sessions nationwide last week.