Who is more at fault for the Mexican-American War?

While President Polk blamed the Mexicans for causing the war because the Mexican governments left the United States with no other choice for defending its national security and interest; the Mexicans did not see this way.

Explanation:

To understand the Mexicans viewpoint of the war, it is important to first understand the problem of annexation of Texas. The annexation of Texas to the United States was unacceptable for both legal and security reasons from Mexico’s point of view. Mexico stated that the annexation of Texas to the United States was a violation of the 1828 boarder treaty, which had acknowledged Mexico’s sovereignty over that territory.