Answer:
The acquiring of the territories gave the United States justification to send out immigrants into those territories and settle the land along the trails created by traders and trappers beforehand. These immigrants and other workers then set up the Transcontinental Railroad to facilitate trade and transport back and forth from the west coast to the east.
Lincoln won with only40%(38.9)of the popular vote
As the electorate expanded, the political parties evolved to mobilize the growing mass of voters as the means of political control. Political parties became institutionalized to accomplish this essential task.
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