George Washington didn't think so:
"Citizens, by birth or choice, of a common country, that country has a right to concentrate your affections. The name of american, which belongs to you, in your national capacity, must always exalt the just pride of Patriotism, more than any appellation derived from local discriminations. With slight shades of difference, you have the same religion, manners, habits, and political principles. You have in a common cause fought and triumphed together; the Independence and Liberty you possess are the work of joint counsels, and joint efforts, of common dangers, sufferings, and successes." Farewell Speech, 1796
George Washington's Farewell Address was devoted to warning of secession and against those who advocated such.