List so far:

WA, OR, CA, NV, ID, MT, WY, UT, AZ, NM, CO, ND, SD, NE, KS, OK,
TX, LA, AR, MO, IA, MN, WI, IL, IN, MS, HI, D.C.

Looks like I got the North and Midwest covered. What does that make? 27(D.C. doesn’t count as a state)? So far so good.