ROGERS — Nearly half of the babies delivered by Hispanic mothers in Benton County last year were born out of wedlock. That was double the rate for white, non-Hispanic mothers in the county. The statistics mirror national trends that have the attention of advocates of all persuasions. Immigration critics warn of looming consequences, from persistent poverty to welfare dependency. The Bush administration also makes the connection: Preventing out-of wedlock pregnancies is a key to its $ 100 million “healthy marriage” strategy for curbing welfare. But in Benton County, the state’s No. 1 home for Hispanic immigrants, health and welfare officials...