Are you URM and/or 1stGen?
As a high-stats/low-income Californian, your natural fallback is to stay in-state. I can’t imagine that you will lack good options in the UC and CSU systems if you apply to a well-chosen range of those schools. I understand that you’d like to go OOS, and ideally you’ll end up with an even better financial package (a no-loan package would be best-case!) from a well-endowed reach school, than what you’d get from a public university in-state. But the question to ask yourself is, where does your in-state backup set the bar? There’s no point in “safeties” that wouldn’t improve upon your in-state options in terms of affordability, reputation, and student experience. I’m not sure you really need “true safeties” outside of CA - you just need some less-reachy match schools that you prefer to the UC’s and top CSU’s.
I agree that Macalester is worth a close look, as an urban LAC that meets 100% of demonstrated need. Reed, in Portland OR, has a distinctive personality that students tend to either love or hate, but if you’re looking for intellectual intensity in an urban LAC, it should be on the list to check out. Grinnell is decided not urban but it’s an excellent school with very generous need-based aid.
The OOS public flagships that would give you need-based aid - UMichigan, UVA, and UNC Chapel Hill - are also very competitive for OOS, but you’re very well-qualified so they’re worth considering. UVA is some distance from DC but is still well-connected in terms of opportunities.
Swarthmore and Haverford are an easy 20-minute train ride outside of Philadelphia, and are excellent destinations for low-income students (good diversity, generous aid, and a very all-inclusive experience where you wouldn’t face daily stress over spending money). If Tufts isn’t already on your reach list, that’s a good one to consider also. If you like Georgetown, other Jesuit colleges to consider would include Boston College, Fordham, and Holy Cross. (BC and Holy Cross meet full need; Fordham does not guarantee full-need-met aid, but has some big scholarships that you’d have a shot at.) Emory could be another worthy target, particularly if you’re interested in the quantitative/big-data aspects of poli sci, as they have a top-notch program in that area.
Denison is another good school (good FA not guaranteed but likely) for poli sci + data analytics and or PPE - Philosophy, Politics, & Economics . Davidson and Dickinson are two more excellent, full-need-met schools that often aren’t on the radar of west coasters. URichmond’s PPEL program (PPE + Law) could be of interest, and Tulane has several variations on poli sci and political economics.
I know you may not be looking at in-state private options, but if you’d consider LAC’s in SoCal, the Claremont Colleges deserve a look as well.
Did you apply EA to Georgetown?