I agree you can major in anything, and really the most important thing academically is to get the best possible grades. This can mean choosing a program where there is enough flexibility to do whatever is going best for you in college. Fortunately most Arts and Sciences programs, either when they are the whole college or when they are a major subdivision within a university’s undergrad program, have that sort of flexibility.
Then you do likely want to carefully watch costs, because to the extent you can minimize debt coming out of law school someday, that maximizes your viable choices for jobs at that point, which is really nice because a lot of the early career law jobs that pay particularly well are not really what many young lawyers want to be doing.
I’ll admit I do not really know much about Maryland’s undergraduate structure, but I gather you can do something called Letters and Sciences before declaring a specific major? Sounds promising. I assume they also would count as relatively affordable, so that sounds like one solid choice. As for chances, I really don’t know, but hopefully this is something where your HS counselor would actually have good information (they should for in-state flagship admissions at a competitive public high school).
In terms of other options, it all depends on affordability, but I do think if you are interested in politics, it can be nice to be in the greater DC orbit, which happens to also match your proximity criterion. But then there are so many–GW and American obviously, William & Mary, Delaware . . . .
I also agree that LACs can be great for people with law school interests, and suitable ones would include Gettysburg, Dickinson, Franklin & Marshall, Washington College, St Mary’s, St Johns if their approach appeals . . . . You could also look a little farther at Lafayette, Muhlenberg, Susquehanna, Ursinus, Juniata . . . .
Of course affordability remains a possible concern, but some of these have a decent amount of merit, so maybe that would help make some of them competitive on costs.