It takes time to get people confirmed, for new policies to get drawn up, advertised, take effect, and for the rest of the government to act on them.
Other than moratoriums and the like, it's hard for me to see policy changing in less than 3-6 months under normal circumstances on changing administrations from one party to another.
But you're right that the general point stands - who controls the White House has life-and-death implications for the AA community (and others). The Congress and the Courts matter too, of course.
It's not, "well they're all corrupt anyway, so it doesn't matter". It does matter. A lot.
Cheers,
Scott.