10 doors? This was nothing but a pres photo-op, not personal campaigning.
The Secret Service, and her own security, is not going to let her knock on random doors. No doubt each house and the residents were checked out before she ever got there with the cameras following her.
The New York senator knocked on doors along a snow-covered block of Manchester...
One block equals about 10 houses. She did it in the cold daylight. Oh how brave of her. Was Huma there to keep her warm?