U.S. Vice President Joseph Biden

U.S. Vice President Joseph Biden

Andrew Harrer/Bloomberg

Obama’s trip to a Toledo plant that assembles Jeep Wranglers follows a week of White House publicity about the automotive revival, including a May 28 radio address by Vice President Joe Biden and a June 1 White House report saying $80 billion of federal aid for Chrysler and General Motors Co. saved at least 1 million jobs at automakers and their suppliers.