The minority leader's job in the House is to rally and keep the opposition together as a voting bloc to ensure that they remain as potent an opposition force as possible, if they find themselves opposing the legislative agenda of the majority.
When Europeans came to the New World, Native Americans were immediately exposed to fatal diseases that Europeans were immune to but they were not. So, if the Native Americans weren't already dead from smallpox and other deadly illnesses, Europeans' thirst for power would kill them. As the New World expanded Europeans met more Indian tribes and would kill them to pave a way for European colonies.
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