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.
Grantism Grantism became a byword for political incompetence, corruption and fraud during the 1870s, while Ulysses S. Grant was President of the United States. The 1869–1877 presidency of Ulysses S. Grant was marred by many scandals and fraudulent activities associated with persons within his administration, including his cabinet, that was in continual transition, divided by the forces of political corruption and reform. Among them were: Black Friday, corruption in the Department of the Interior, the Sanborn incident, and the Whiskey Ring. (The Crédit Mobilier scandal, although exposed during his tenure, is not considered a Grant scandal.)