Might be Geranium dissectum which is often weedy.

That plant and its leaves are way too large for Geranium dissectum. Sorry that I don't have a better suggestion.

It could be Aconitum napellus or similar Aconitum sp. So you have never seen a bloom?

Could it be "shredded umbrella plant - syneilesis aconitifolia?

I haven't seen a bloom but I don't know if it's too early in the season.

It would be too early for Aconitum n. or a Geranium most likely. I meant in the previous two years.

It's currently about 8 inches (20 cm) tall right now. There are also other clumps of it showing up. I honestly don't recall what it looked like last season. I've been so overwhelmed with this yard and trying to keep up with it.

Not shredded umbrella plant, Syneilesis aconitifolia. I think it's a Delphinium grandiflorum such as Blue Butterfly. There are a fair number of cultivars of this species. They tend to have a cloud of blue flowers that stay around 2' and in my garden seed fairly often, though never enough to be a problem. It looks like you have a flower stalk starting so you should be able to confirm relatively shortly.

In the photo below you can see the general growth pattern of the plant and a leaf or two near the base.