What railroad for which Oakes Ames is credit as being the single most important influence in building was caught up in the  Crédit Mobilier scandal?
Oakes Ames Oakes Ames (January 10, 1804 – May 8, 1873) was an American manufacturer, capitalist, and member of the United States House of Representatives from Massachusetts. As a congressman, he is credited by many historians as being the single most important influence in the building of the Union Pacific portion of the transcontinental railroad. He is also noted for the subsequent scandal that alleged the improper sale of stock of the railroad's construction company.
Railway Express Agency The Railway Express Agency ("REA") was a national monopoly set up by the United States federal government in 1917. Rail express services provided small package and parcel transportation using the extant railroad infrastructure much as UPS functions today using the road system. The United States government was concerned about the rapid, safe movement of parcels, money, and goods during World War I and REA was its solution to this problem. REA ceased operations in 1975, when its business model ceased to be viable.