Because they could be turned into slave states, giving more power to the slaveowners in the south. Also, expansion policy and the dram of Manifest Destiny played a part in desiring that land.
The best answer to the question that is being presented above would be the Ordovician mass extinction. <span>Jawless fish and ocean reefs were devastated by the end of the Ordovician mass extinction. </span>
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The Clayton Antitrust Act, passed in 1914, continues to regulate U.S. business practices today. Intended to strengthen earlier antitrust legislation, the Clayton Antitrust Act prohibits anti-competitive mergers, predatory and discriminatory pricing, and other forms of unethical corporate behavior.
Explanation: