Just got this from Sipsey Street just now:

“Mike Vanderboegh, husband, father of three, and founder of the III% movement passed peacefully in his beloved Alabama home today.

A formal statement from the family will be forthcoming.

Thank you so much for your continued support.

We would like to ask that if you were touched by Mike Vanderboegh or the movement that he so dearly loved, please change your Facebook pic to the Nyberg Flag” above.