Sorry, I should have said "most sheriffs".
I read tonight on the Rocky Mountain Gun Owners Twitter feed that El Paso County Sheriff Terry Maketa is filing paperwork with the attorney general of Colorado to investigate extortion and blackmail of the county sheriffs who have voiced their opposition to these gun control bills. Someone finally posted the audio of the radio show in which Sheriff Maketa brought this to light.
The audio can be heard here:
Basically, an email was received by Sheriff Maketa that stated that the senate democratic leadership is very upset with the sheriffs that oppose these gun bills. The email said that they should reconsider their position to gain a more favorable light for salary support from the democrats. You can listen to the interview to get the Sheriff's side of the story.