The Rhetoric of "manifest destiny" in the American Press
(I think)
Mexican immigration increased
Bring the Mexican government to the bargaining table.
A 100 years ago there was no Mexican immigrants.
Previous acquisitions were land purchases; the Mexican Cession was the result of war with Mexico (the Mexican-American War of 1846-1848).
Mexican War
Actually, it hasn't declined. It has increased by %15 due to failure of the Mexican government.
Increased tension in the US over the issue of slavery.
to oppose U.S. territorial expansion during and after the Mexican War.
The Mexican-American War. In particular, the admission of California made the Missouri Compromise unworkable.
By renaming a region of the United States, Chicago activists drew attention to previous mexican territorial claims
The Mexican-American War. In particular, the admission of California made the Missouri Compromise unworkable.
The size of the US increased by one third.