snopes.com: Secret Service Opinions of Clintons
This information is very well known by insiders in the Federal agent community. Check out the above link. You may be surprised.
Hillary Clinton's nomination to serve as secretary of State creates an unique jurisdictional battle between the U.S. Secret Service, which protects current and former presidents and first ladies, and the the State Department's Bureau of Diplomatic Security, which protects the secretary of state, visiting foreign dignitaries and all American diplomatic missions abroad.