No. The DNC 2008 candidate was decided well before the convention.
Superdelegate - Wikipedia, the free encyclopedia
At the
2008 Democratic National Convention, the superdelegates made up approximately one-fifth of the total number of delegates. The closeness of the race between the leading contenders,
Hillary Rodham Clinton and
Barack Obama, led to speculation that the superdelegates would play a decisive role in selecting the nominee, a prospect that caused unease among some Democratic Party leaders.
[13] Obama, however, won a majority of the pledged delegates
[14] and of the superdelegates, and won the Democratic presidential nomination.
[15]