Former longtime District 4 supervisor Gary Giacomini said it was a “no-brainer, given the field” that he would endorse Dominic Grossi, a Novato rancher, in the upcoming supervisor race. Mr. Giacomini, a founding board member of the Marin Agricultural Land Trust, said the protection of agricultural lands—a major part of his own legacy as a county supervisor for 24 years—was the most critical issue in the race for him. Although virtually every candidate has voiced…