Because the American people where scared that if they gave people that much power over them, like there would be in a strong central government, then the same tyranny that happened with King George and Great Britain, would happen again in their own government.
They passed the Espionage and Sedition Acts which allowed the government to arrest and fine anyone speaking out against the war.
Answer:
The expedition was unofficially initiated by the then President of Texas, Mirabeau B. Lamar, in an attempt to gain control over the lucrative Santa Fe Trail and with the ulterior motive to acquire parts of New Mexico for the Texas Republic.
They believe it would be solved by Currency reform.
