Maybe sumac (Rhus). What is growing nearby?

Thanks. Not sure as it doesn't have that many leaves yet and I am not familiar with their growth habit. Do sumacs have toothed leaves? None growing nearby.

Look how similar this is:

https://www.oardc.ohio-state.edu/weedguide/display_photo.php?id=96&photo=717

Yes I think you are right. Of course with squirrels you always have new trees coming up. Thanks for the image link!

I walked by a recently suckering sumac yesterday and what I saw confirmed my suspicion that your plant is a sumac.

Of course I felt this to be the case originally because of what I had already seen in the past. When the suckers first come up they can be small, with different looking leaves, as though they were seedlings themselves.