One that’s shockingly like yours in demographics and voting histories.
The Commonwealth of Pennsylvania.
I live in VA. The demographics and voting histories are far from being similar. VA went Democrat in 2008, the first time that has happened since 1964 (presidential elections.) On the other hand, PA has gone Democrat 7 times since 1968 and continuously since 1992.
Re demographics: PA has a population that is 83% white, 11% black, and 3% Asian. 5.9% are Hispanic. 15.6% of the population is over 65. 5.6% foreign born. 26.4%% have a BA or higher. 1,034,976 are veterans.
VA has a population that is 71% white, 20% black, and 6% Asian. 8.2% are Hispanic. 12.5% of the population is over 65. 10.8% foreign born. 33.8% have a BA or higher. 749,609 are veterans.