I am sort of confuse becouse this is phrased as one question (at first i thought you where talking about the recent fight about not putting in a pipeline but i relized you said why DID)
So i will split it into 2 Native americans fought for land becouse for one they needed a place to live and second they belived the great spirit wanted them to live where they did
They fought for water to live/drink
A lot of people had to move with it
The statement that best explains how the idea of Manifest Destiny led to the Mexican-American War would be that "<span>Mexico was a barrier to achieving what many believed was America’s destiny to expand to the Pacific," since Manifest Destiny held that the US was "destined" to expand all the way to the West Coast. </span>
Im going to assume its because a "lame duck" session only happened when congress meets after a election.
Its called the castle doctrine
