Why were American fascinated by the idea of United States stretching

Answer 1

from coast to coast?

The idea of the United States stretching from coast to coast was incredibly appealing to Americans because it represented the potential for a new beginning and a new life. The idea of a vast, open land with seemingly endless possibilities was incredibly attractive to those who were looking for a fresh start or a chance to make something of themselves. Additionally, the idea of a nation that was so large and powerful was a source of pride for many Americans, as it showed the strength and potential of the United States.