LBJ & Lady Bird to Detroit; Gov. Romney meets plane; LBJ gives speech with heckler in crowd; standing ovation; Lady Bird mentions LBJ's health; to Battle Creek, Michigan; 1948 Campaign; as child, Lady Bird went to Battle Creek Sanitarium with Aunt Effie; Lady Bird gives speech; to Dayton, Ohio; LBJ speaks at Montgomery County Fairgrounds; protesters; to Columbus, Ohio, and fairgrounds in Lancaster; LBJ uses bullhorn on streets, and requests ice cream at Dairy Queen; rain during speech