Barack Obama fought her to a draw Super Tuesday, posted four routs since, and may notch another trio of victories tomorrow.

Yet of the 796 lawmakers, governors and party officials who will be counted as Democratic superdelegates and who will vote at the national convention in late summer, Hillary Clinton still enjoys an edge.

An Associated Press count has Clinton with 243 and Obama 156, though these superdelegates may change their minds at any time.

That edge was responsible for Hillary Clinton’s dwindling advantage in the pursuit of delegates to secure the party’s nomination for president.

CNN’s count, which we use at right, differs somewhat (Clinton leading 224-135 in superdelegates) but underscores the same point.

She maintains an institutional advantage, which is not shocking, but there is now growing uncertainty over how strong Clinton’s support might be should Obama continue to pile up double-digit like he did this weekend.

Also fading fast with each Obama victory, along with Hillary Clinton’s perceived favorite status, is any chance of a deal to team up on the ticket. Neither seems particularly interested in playing second fiddle here.

The questions remain: Where do the undecided superdelegates come down if these remaining primary states end in a virtual tie? Can Barack Obama overtake Hillary Clinton’s overall delegate lead (27 by our count) so there is no doubt? He’s got some momentum now, but there is still no telling.