Fox News Poll: Looking ahead to America's 250th anniversary

American voters are patriotic, proud of the country, and optimistic the best days are ahead, even as they are split on how well the United States is doing living up to its founding principles.

As the country approaches its 250th anniversary, a Fox News national survey finds voters are divided on the progress America has made toward achieving such ideals as liberty, equality, and self-reliance, as nearly half rate that progress positively, while a narrow majority gives it negative marks.

FOX NEWS POLL...