In two to three sentences, identify two key
consequences that the Mexican-American War
had upon the United States.

The consequences of the war were ascension of Texas and the drawing up of southern borders of US

Explanation:

The war that is being discussed resulted in a complete and absolute American victory which gave them sovereignty over many of the territorial lands that they had occupied at that time.

The two consequences would be:

1. This was decided in the Treaty of Guadalupe Hidalgo where the Mexican recognition of U.S. sovereignty over Texas was supported to be a finality.

2. It was also the time that the southern border of the country were decided and there was little conflict with Mexico after.

bless you your highness