A new survey of bankers in rural parts of 10 Plains and Western states, including all three Siouxland states, suggests they're optimistic about the economy over the next few months. Creighton University economist Ernie Goss oversees the Rural Mainstreet Survey, and he says the signings of the U.S.-Mexico-Canada trade agreement and the China trade agreement have boosted economic confidence across the region. The overall February survey index declined, however, to 51.6 Organizers say scores above