How did Manifest Destiny affect U.S. policies during the 1800s?

Answer 1

Read lots and let us know what you think.

http://www.google.com/search?q=effects+of+manifest+destiny&oq=effects+of+manifest+destiny&aqs=chrome..69i57.5345j0j7&sourceid=chrome&es_sm=119&ie=UTF-8

Answer 2

I'm late getting in here, but, Victoria, pay special attention to the year 1846, President James K. Polk, and the Mexican-American War.