We agree that this looks like a Speedwell (Veronica) species given the flower traits (flowers are very important in plant ID), and Thyme-leaved Speedwell looks likely given the leaf traits as well. Of the multiple Veronica species that grow wild in Maryland, only three are native, and this does not resemble any of those. The rest, about a dozen species, are non-native. While Thyme-leaved Speedwell is not invasive per se, it isn't native, so you can remove it if you prefer, though it is already found state-wide.

Miri