A third group of Democrats formed the Constitutional Union Party and selected John Bell as their presidential candidate. Because the Democratic vote was spread so thin, Republican Abraham Lincoln defeated Douglas, Breckenridge, and Bell in the 1860 presidential election.
Polk wanted to push Mexico into negotiating with the USA. He did not expect Mexico to put up such a fight.
The correct answer is the Indian Removal Act of 1830 or also known as the Trail of Tears, wherein it called for the relocation of all the existing Eastern tribes, there are 5 known civilized tribes that were resettled in the present location known as Oklahoma.
