Because it was an area in which slavery was legal, and to bring it into the Union would destroy the balance in the Senate between slave states and non-slave states. Also because the U.S. didnt want :D
At midnight
It did not annex Texas.
The vote in congress to annex Texas
They were afraid it would get them into a war with Mexico.
Nine years later, Texas joined the Union.
Congress voted to annex Texas
document 21
Oregon and Texas.
The US annexed Texas from Mexico in 1844 after James K Polk won the presidential election.
The republic of Texas
They feared Texas would join Britain and declare an end to slavery.
They feared Texas would join Britain and declare an end to slavery.