Can you explain the phrase "American National Narrative"? Provide some examples based on American culture and ideology.

A national narrative as a concept constitutes a statement of how a nation-state collectively understands or idealizes all or part of its history. National narratives unite the people of a nation-state across space and time, giving an overarching sense of meaning and purpose to that nation's history. Most national narratives begin with an uncontested founding story.
While some scholars have questioned the existence of an American national narrative (see Peter Novick, "The American National Narrative of the Holocaust: There Isn't Any" New German Critique No. 90, Taboo, Trauma, Holocaust [Autumn, 2003], pp. 27-35), most work on the American national narrative begins with the arrival of the Puritans to the Massachusetts Bay, a starting point that is an "explicitly Judeo-Christian story, built on a certain view of God’s providential plan." As David Brooks, Senior Fellow at Yale University's Jackson Institute for Global Affairs and political and cultural commentator, explains, "For most of the past 400 years" America's national narrative "was the Exodus story," beginning with "the Puritans [who] came to this continent and felt they were escaping the bondage of their Egypt and building a new Jerusalem."
America, however, does not have only one national narrative. As America has diversified, America's Puritan founding as a "City upon a Hill," ordained by Providence, has become increasingly contested. America's Manifest Destiny is a common alternative narrative that has helped explain American expansion and diversity. However, scholarship that has increasingly revealed the coercive nature of western expansion has also called this national narrative into question. Cultural and political commentators today bemoan the loss of an agreed-upon American national narrative and see its contested existence today as evidence of an increasingly heterogeneous and polarized American society.
https://www.nytimes.com/2017/05/26/opinion/the-four-american-narratives.html