Pokeweed

Your plant is pokeweed. It grows up to 10 feet tall and is noted for purple berries that follow white flowers later in summer. Rampant in some areas and certainly a bully in the garden bed, but a valuable wildlife food source and a handsome plant. The berries are poisonous (to humans – birds love them!). It’s a stunning plant, and an important resource for wildlife, so you might enjoy having it around for a while, if you can still get in and out that back door… some good info here, along with photos of what it looks like as a young seedling (because we’re betting the birds who brought you this one might bring you another – maybe in a more convenient location!): http://www.oardc.ohio-state.edu/weedguide/singlerecord.asp?id=270