How did the credit mobilier scandal tarnish grant?

The Credit Mobilier scandal tarnished President Ulysses S. Grant's reputation by exposing corruption within his administration. It involved railroad executives using a construction company to defraud the government, with revelations that several Congress members and officials were implicated. Although Grant himself was not directly involved, the scandal damaged public trust in his leadership and highlighted the widespread corruption during his presidency, leading to criticisms of his ability to govern effectively.