Gov. Michelle Lujan Grisham’s chief of staff, John Bingaman, has taken a leave of absence from his duties in New Mexico to serve as an adviser to Democratic presidential candidate Joe Biden’s transition team. Bingaman began in the new role Oct. 5 and took leave from Lujan Grisham’s office because the Biden advisory role is “not within the scope of the governor’s official duties for the state of New Mexico,” the Governor’s Office said.