Ohh you know - I don't know. I was heading out for a walk, looked down and thought - "Ah geez a tomato plant!" but it is possible it could be a potato. In the backyard, in the garden this year I'm growing a tomato plant "Stupich" and it REALLY looks like a potato vs a tomato. Will have to give it a closer look.
There are tomatoes that are called 'potato leafed' tomatoes. I've grown stupice before and they are good tasting (to me).