He was pressured by James Gadsden to either sell, or risk another war against the United States in which Mexico would also lose the Baja California peninsula. The sell was so unpopular in Mexico that it eventually allowed the congress to oust Santa Anna into exile.
The US Congress.
On 13 May 1846, the US congress declared war on Mexico. Mexico never declared war on the United States.
No, the US went to war with Mexico.
In Congress, there were about 20 men, called "War Hawks" that pressured Madison to declare war on Britain to stop the British from attack American ships and impressing their sailors in the British Navy
Well if you are asking about the war with mexico that took place during 1846-1848 it would be president james k. polk.
Was passed by Congress on 13 May 1846.
Polk asked Congress to declare war on Mexico and was President during its duration.
Congress declared war on 13 May1846 but by then the war had been going on for three months.
To pay for the war
No
President Polk asked Congress for the declaration of war after Mexican soldiers shot US soldiers in the disputed region between Mexico and the State of Texas. Each side accused the other of invading their country.