By HOPE YEN Associated Press WASHINGTON June 23, 2011 (AP) For the first time, minorities make up a majority of babies in the U.S., part of a sweeping race change and growing age divide between mostly white, older Americans and predominantly minority youths that could reshape government policies. Preliminary census estimates also show the share of African-American households headed by women — made up of mostly single mothers — now exceeds African-American households with married couples, a sign of declining U.S. marriages overall but also continuing challenges for black youths without involved fathers. The findings, based on the latest government data, offer a preview of final 2010 census results being…