Abraham lincoln's primary impact on the construction of the transcontinental railroad was to

He helped Congress passed the Pacific Railway Act, which authorized the construction of a transcontinental railroad. The first such railroad was completed on May 10, 1869. ... Four of the five transcontinental railroads were built with assistance from the federal government through land grants.

Lincoln signed the Pacific Railroad Act of 1862 into law, which stimulated the construction of the railroad.

Explanation:

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gather news from your preferred source

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