As she wrote in this Facebook post,
It sounds like a weird move, I know. The Post is a dream place to work in many ways, and I have fabulous colleagues whom I'll miss very much. But ever since I took a bus down here after graduating from college in 2009, I've maintained a strong belief that few serious reporters spend their entire 20s holed up in the capital of the free world.
Props to DePillis for making this huge decision. I, for one, will miss her local reporting.
Good luck, Lydia!!