One lasting political impact of the Mexican American war was

The correct answer is that one of the lasting politcal impactd of the Mexican American war was the union of Texas, Nevada, Colorado, Arizona, New Mexico, Utah.

Explanation:

Those states were part of the Guadalupe Hidalgo treaty, that the United States bought form the Mexican goverment for $15 million dollars

Date: April 25, 1846 - February 3, 1848 (1 year, 9 months, 1 week and 1 day)

Result: American victory Treaty of Guadalupe Hidalgo Mexican recognition of U. S. sovereignty over Texas among other territories. End of the conflict between Mexico and Republic of Texas