DES MOINES — President Donald Trump has granted a disaster declaration for 56 Iowa counties swamped by flooding.The presidential declaration will make assistance available to homeowners, renters, businesses, public entities and select nonprofit organizations in counties affected by flooding in the Missouri River Valley in western Iowa.The declaration also will provide assistance in Allamakee, Bremer, Butler, Fayette, Tama and Winneshiek counties in Eastern Iowa.Gov.