They did not allow the native americans to stay, they were basically evicted.
The phrase "we the people" as it relates to the constitution was meant to signal a large-scale inclusiveness of the voting population--meaning that the Founding Fathers wanted to ensure that all eligible (mainly male, white) citizens could have an equal say in government, so that tyranny did not form.
Answer:
If Spain colonized Americs before we did then life could be way different. There wouldn't be a Revolutionary war or a Civil War. Spain would be more powerful cause of all of that land that they would have. Maybe they wouldve been no match for the Indians and the Indians may have fought all of them off. All of us today most likely would not be speaking English and would be Spanish witch would be wild. This is how life would be different if Spain took America over first.
DID THIS KINDA FAST BUT I HOPE IT HELPS