House Democrats' incoming freshman class is barely a week old and already threatening to defy party leaders in ways most of their incumbent colleagues wouldn't dare. Why it matters: It's a dynamic House leaders may have to learn to live with as they integrate a massive group of new members who were swept into office on a wave of populist, anti-establishment anger."My class is huge not because of ... the Democratic Party and its brand but despite it," said Rep.-elect Don Leonard (D-Ohio).