In modern times the Secret Service has become more of a Tyranny enabling oligarchy ignoring oath, duty to the Constitution of the United States, and lacking in applying enforcement of the nations laws equally, including applying enforcement upon the president himself.
No POTUS should be above the law nor arrest for violations thereof. President Grant was arrested {cited} for speeding. Has any POTUS been cited for anything since? Protection of POTUS from assailants is a necessary job and I don't dispute that is a legitimate and needed function of the Secret Service. Likewise the standard of protecting the people from unlawful Tyranny by any branch they protect should also be a function of the Secret Service. That includes exposing any and all blackmailable offenses of public officials while still holding office.
Keep in mind what I am saying here. Secret Service should if violations occur use their arrest powers. Congress should then after being informed publically should hold trial for Impeachment and if needed removal.
Interesting idea. Thanks.