MIDDLEBURY — In the Democratic primary race for lieutenant governor to be held Aug. 11, three candidates have been actively campaigning since early this year: Molly Gray, Ryan McLaren and Esther Charlestin. Gray was Vermont’s Lt. Gov. for a single term from 2021-2023, and for the past two years has been the executive director of the Vermont Afghan Alliance; McLaren has worked in political organizing most of his life, worked in the Vermont Depart…