I'm sure there's more but I'm aware of one in So Oregon, Josephine County Sheriff Gil Gilbertson wanting some answers over a year ago. He was getting a lot of complaints from county residents being harassed by Feds.
More Sheriff's should be speaking up for the 10th Amendment.
OREGON SHERIFF GIL GILBERTSON CONTINUES STAND AGAINST U.S. FOREST SERVICE
http://www.newswithviews.com/NWV-News/news287.htm
Last September, Gill and five other local sheriffs spoke to
an almost standing room crowd at the fair grounds. Subject
was local sovereignty and was sponsored by the National
Constitutional Sheriffs Association, LLC and Veritas Research
Consulting.
www.veritasresearchconsulting.com