Please do not feed the deer
The Wildlife Management Institute's position on supplemental feeding can be summarized by the following quote from their publication Feeding Wildlife Just Say No:
"supplemental feeding --however well intentioned— either compromises the animal's wildness or wellness, or it interferes with the essential natural processes of selection. For the long-term benefit of big game wildlife populations, supplemental feeding is an accident waiting to happen. When and where such feeding is done, it is undertaken only--if not expressly--for the interest of people, because the fed animals almost invariably will not benefit and very likely will be harmed by the practice".
MD Department of Natural Resources: Deer In Maryland
MD Department of Natural Resources: Deer 'resistant' plants for pollinators
Pennsylvania Game Commission: Please Don't Feed the Deer (Direct link to PDF)