Who do the secret service agents report to?

The Secret Service Division was created on July 5, 1865 by the treasury department months after Lincolns assassination. At that time they were not established to help protect the president. it wasnt until 1901 after president McKinley was killed that congress asked the US Secret Service to take on the reponsibility of protecting the president. they were run as a branch of the treasury department until 2002 when they were transferred from the department of treasury to newly created department of homeland security. See the related links for more details.