In recent elections, worship attendance has been a telling factor in party affiliation and voting patterns. But John Green, Senior Fellow at the Pew Forum on Religion and Public Life, draws on some recent data showing that this correspondence is changing, particularly among mainline Protestants and Catholics. (02:28)

Why is there movement? In this video Green discusses the broadening of issues leading some socially conservative evangelicals to support a Democratic candidate or Giuliani. (02:40)