Exact ave search volume is low, 140/mo. with a cpc of $0.61 which will probably fall dramatically in the off season. The plural version (states) get 1300/mo in comparison. In three years the timing should be better for selling. Hopefully the economy will be better in three years too.
At this point xxx, or develop and wait three years.
Here are some stats:
G("republican state") = 772,000 (3 ads)
G("republican states") = 131,000 (no ads)
G/adwords(republican state) = $0.61 cpc @ 140/mo
G/adwords(republican states) = $0.74 cpc @ 1300/mo
The plural version is for sale with a bin of $499, which tends to put a price cap on it.