Question

In the mid-1800s, Democrats believed that a policy of Manifest Destiny would

Answer 1

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In the mid-1800s, Democrats believed that a policy of Manifest Destiny would have the following effect; 

It would boost the American economy and open up economic opportunities.

The Manifest Destiny was the philosophy that the Americans were destined by God to conquer and rule the North American continent. They believed that expansion of land would bring more sources of economic activity with expansion.