Why does a candidate usually “shift to the center “ during the general election campaign ?

One specific historical event or development during the period 1786-1861?

Review the territory. all land from the bighorn mountains down to south dakota territory. what happened to this territory as a result of the treaty of fort laramie in 1868? it was confiscated by the us government, as a consequence for the battle of the little bighorn. it was given to the us government by the lakota sioux, who got reservation lands in exchange. it was gifted by the us government to the lakota sioux, who viewed it as a sacred place. it was allocated for lakota sioux to settle, but the us government maintained mining rights.

The three estates social system in france ensured balanced representation of all people and treated each social group fairly. true or false ? why?