Md traffic near and towards DC is awful. Md traffic towards baltimore isn't as terrible, but not great. Otherwise it's general nice. Rush hour sucks. If you are working 5am, 7am (7am can be ruined by an event or something which is fairly common depending on where you are going), 2pm, or night shift generally it's not too bad.

Politically, towards the coast it's a very liberal area. As you move inland it generally becomes more conservative.

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Weather, it actually doesn't snow that much, and most of the roads are well maintained for snowfall. Watch your speed. Don't accelerate while turning, don't brake while turning, and you should be fine. That being said, because it doesn't snow that much, when there is a lot of snowfall, there isn't enough plows to keep up with the roads and it quickly turns into emergency routes are the only decently maintained areas. Which good news, as a nurse there is a good chance your commute will be mostly covered.