For 10 points, name this project that connected the United States by train.
Eli Whitney's cousin Asa Whitney was one of the first people to propose the idea behind this project, which was also championed by Theodore Judah. James Durant bought out the Pennsylvania Fiscal Agency and replaced it with a corporation which organized this project; Oakes Ames fraudulently bribed legislators with stock in that corporation in the Credit Mobilier Scandal. This entity was financed by the Big Four, which included Leland Stanford. A primary motivation behind the Gadsden Purchase was land for this project, which was finally finished at Promontory Summit, Utah, in 1869. For 10 points, name this project that connected the United States by train.
Eli Whitney's cousin Asa Whitney was one of the first people to propose the idea behind this project, which was also championed by Theodore Judah.
First Transcontinental Railroad [or the Overland Route]