Caregivers who work for MaineHealth Care at Home (MHCAH) are calling for the removal of management executives. This week, the majority of employees at the agency, more than 60 of them, signed a petition of no confidence in their leaders. Nurses and clinicians expressed their frustrations during a rally in Portland on Friday outside the MHCAH office off Washington Avenue. The caregivers are represented by the Maine State Nurses Association, a branch of National Nurses United.