 At Iowa's Jefferson-Jackson fundraising dinner Obama expanded the theme, saying that his presidency would "bring the country together in a new majority" to seek solutions to long-standing problems.On November 21, Obama announced that Oprah Winfrey would be campaigning for him in the early primary states, setting off speculation that, although celebrity endorsements typically have little effect on voter opinions, Oprah's participation would supply Obama with a large, receptive audience.As word spread that Oprah's first appearance would be in Iowa, polls released in early December revealed Obama taking the lead in that decisive state.