<span>http://teachingresources.atlas.illinois.edu/chinatrade/introduction04.html</span>
They failed because nobody cared about the railroad. The railroad had to be a government project with leases to companies but the government was too much involved in the slavery issue that it didn't have time to deal with railroads. That's why railroads boomed after the civil war ended.
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Answer:
By using the Necessary and Proper Clause of the Constitution
Explanation:
