One lasting political impact of the Mexican-American War was

Responses
A the dramatic increase in taxes in order to pay for the war.the dramatic increase in taxes in order to pay for the war.
B increased tension between northern and southern states in the U.S.increased tension between northern and southern states in the U.S.
C slavery becoming legal in new western territories entering the U.S.slavery becoming legal in new western territories entering the U.S.
D a loss of American lands to the Mexican government in modern New Mexico.

C slavery becoming legal in new western territories entering the U.S.