Why do you think Native Populations were not included in the Democratic process?

2 answers

Many settlers considered the Natives as savages and just barely human. Remember, at the time of the U.S. independence only white males who owned property could vote. Blacks couldn't vote until 1870, and women couldn't vote until 1920.
Also remember that Andrew Jackson forced many tribes to go west. Why? They wanted native land for settlers to farm.