Sumac Yes. Staghorn Sumac I’m going to say No.
I have plenty of Staghorn Sumac up here and your leaves are not the same. Staghorn sumac has serrated leafs (ie noticeable saw tooths), your leaves appear to have smooth edges in the photo. That means it is not likely Staghorn. The stems appear hairy in the photo so that probably eliminates smooth sumac too. I’m going to go with Rhus copallina for your species of Sumac. The common name is Flameleaf, or Shining Sumac.