Yes! Croatia. That's right.
So we discover in this latest offering from Strange Maps : a comparison of U.S. states to nations with similar-sized economies. (As the authors note, it can be a misleading statistic, since the map doesn't account for population, and Ecuador has lots more people than its seeming peer, North Dakota.)
Still, it's an interesting map. California's economy is akin to France's, Arizona's on par with Belarus, and Maine with Morocco.