CHARLESTON, W.Va. (AP) -- More Democratic superdelegates are lining up behind Barack Obama.
New Orleans Mayor Ray Nagin and Indiana Congressman Joe Donnelly have both endorsed the Illinois senator. Donnelly's endorsement of Obama comes even after Hillary Rodham Clinton narrowly won his state's primary.
A statement from Nagin says Obama can "heal the divisions of the past and unify this country."
Obama is not banking on a win today in West Virginia, and is instead mounting a two-week tour that will take him to the remaining primary states but concentrate on fall battlegrounds including Florida and Michigan.
Clinton's best hope is to use strong showings in West Virginia and Kentucky to make the case that Obama is weak among key Democratic constituents.