JACKSONVILLE, Fla. -- One of the leading Democrats in Jacksonville and a strong supporter of Sen. Hillary Clinton's run for president is confident her candidate will win Tuesday's primary in Pennsylvania and keep fighting for her party's nomination.

"It is huge and it's going to be all the way to the convention," U.S. Rep. Corrine Brown said Monday.

On the eve of the highly anticipated Pennsylvania vote, Sen. Barack Obama leads Clinton by 139 delegates. A candidate needs 2,025 to get the nomination.

Pennsylvania's 187 delegates will be divided up according to how that state's registered Democrats go to the polls. While Clinton is favored to win, analysis said she needs a knockout victory for her to challenging Obama.

"If she wins Pennsylvania that give more momentum and a bigger reason to keep the fight going," said Matt Corrigan, political science professor at the University of North Florida.

Because the Democratic National Committee says it will not seat Florida and Michigan's delegates because they held primaries earlier than party rules allowed, no candidate is likely to have enough delegates to claim the nomination sewed up before the convention.

Brown also thinks delegates from Florida and Michigan will be seated. Clinton won the primaries in both states, even though the candidates were not allowed to campaign.

"If you count Florida, we're are in dead heat," Brown said. "Florida and Michigan must be counted."

Even with those votes, the nomination will likely come down to the party's superdelegates -- elected officials allowed to vote because of their position in the party. Brown is a superdelegate pledged to Clinton.

Corrigan agrees with Brown when it comes to counting Florida and the delegates -- which he said the party must deal with soon.

Brown says the fight is on, marches and demonstrations planned for the near future. She said she'll carry that to the convention if Florida delegates are not seated.

"The Democrats have got to count it," brown said. "You can put lipstick on a pig, but it's still a pig. Florida must be seated."