Summary
“Constitutional sheriffs” are a group of law enforcement officials who believe they hold supreme authority in their counties and can disregard state and federal law.
These sheriffs have become prominent figures in the election denial movement, and some have taken actions that critics view as dangerous, such as attempting to seize voting machine, assembling armed posses to patrol near polling stations, and refusing to enforce any law they view to be unconstitutional.
The Constitutional Sheriffs and Peace Officers Association, led by Richard Mack, has bolstered the movement, attracting sheriffs nationwide and featuring prominent election denial figures like Mike Lindell and Michael Flynn at their events
Also both the constitutional sherriffs and sovcits grew out of the militia movement of the 80s and 90s. They are basically the same movement just different aspects of it.