Territories obtained in the Mexican American War of 1848 caused further sectional strife over the expansion of slavery.
<h3>What is Mexican-American War?</h3>
Mexican-American War can be regarded as the annexation of republic of Texas which occured as a result of dispute over the boundary of Texas is at Nueces river .
This war create more tension between the North and the South because of sectional strife over the expansion of slavery.
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Answer:
C. both personal events and historical events
requires the President to consult with the legislature in every possible instance before committing troops to war.
The answer would be letter A.