What connection does O’Sullivan see between manifest destiny and the idea of American freedom?

Chapter 131- What was Manifest Destiny and how did it impact western settlement in the years leading up to the Mexican War? 2- What happened in the 1844 presidential election and why was it a fateful election for the direction of the United States? Based on the outcome, was the election a clear mandate for change or not? Explain.3- How and why did we fight the war against Mexico? Why didn’t we go to war over Oregon Territory with Britain liked we said we were at the same time? Who supported the Mexican War? Who opposed it? Why? What was the outcome and what did that mean for the United States?4- How and why did the prophecy that Mexico was poison play out for the United States from 1846 through 1861?5- How did federal legislation attempt to resolve the slavery issue in the western territories during the 1850s? How and why did everything that they did make the divisions escalate?Primary: a- What connection does O’Sullivan see between manifest destiny and the idea of American freedom?Sources are Give me liberty and Voices of freedom edition 5th volume 1