Why were southerners more likely than northerners to support the mexican-american war?
southerners supported manifest destiny, while northerners did not.
states that formed from the new territory would likely allow slavery.
more southerners belonged to the whig party and supported the war.
southerners lived near the border and were concerned about attacks.

Option B States that formed from the new territory would likely allow slavery is the right answer.

On the issue of Mexican group's attack on Americans (in North of the Rio Grande United States), the Senate of the U.S voted to go to war with Mexico. Whereas, the Northerner's lawmakers were worried that a war with Mexico would promote the expansion of the Slavery as Mexicans claimed the land as their own territory. Many of the Southerners supported this Conflict just because they knew that America had the potential to win the war and that it would supplement them with more land (beneficial to agriculture where slaves would be required for the field) hence, they took it as an opportunity to gain more slave States.

However, the War took place, providing the United States with a vast new territory and the question of slavery soon developed into an angry prong between North and South.

the roman empire began to fall

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.