Views on the Mexican-American War and American Conquest in the Southwest

Describe the main point(s) presented in each article.  In other words, according to each author, what factors contributed to the American takeover of Mexican territory?
What were the key factors that caused the United States to declare war on Mexico? Compare the different views of the authors.
. How are these viewpoints similar to each other and how are they different?
Evaluate the strengths and weaknesses of each viewpoint?  What evidence does each author provide to support his point of view?
Determine which author provides the best explanation for why the Mexican-American War took place.

USE THE SOURCES PROVIDED