Task: Text Categorization
Input (English): This event was investigated by a committee led by Aaron F. Perry, and it was publicized thanks to letters leaked by Henry Simpson McComb. A company involved in this event was founded by George Francis Train and Thomas Durant. It occurred because Oakes Ames offered (*) shares in a certain construction company to other congressmen at discounted rates during the construction of the First Transcontinental Railroad under the purview of Union Pacific. For 10 points, name this scandal which took place in 1872, during the presidency of Ulysses S. Grant.
Output (English): History