FACTBOX: High-profile, uncommitted Democratic superdelegates

(Reuters) - The race for the 2008 Democratic presidential nomination may be settled by the superdelegates, members of Congress and other party insiders who are free to vote for who they want at the August Democratic presidential nominating convention in Denver.

About 180 of the superdelegates have yet to endorse either Sen. Barack Obama or Sen. Hillary Clinton.

Obama is about 40 delegates shy of the 2,118 needed to clinch the nomination, and could reach the number quickly with help from uncommitted superdelegates.

Here are some of the high-profile superdelegates who haven't yet taken a stand on who should be the party's nominee.

* U.S. House of Representatives Speaker Nancy Pelosi of California. She has drawn complaints from some Clinton supporters for saying members of Congress should reflect the will of the people in their districts in deciding who to back.

* U.S. Senate Democratic Leader Harry Reid of Nevada. In a recent interview with National Public Radio, Reid said superdelegates should vote for whoever they want.

* Former Vice President Al Gore, who was the Democrats' failed 2000 presidential candidate; in 2004, Gore backed Howard Dean, who lost the Democratic nomination to John Kerry.

* Democratic National Committee Chairman Howard Dean. Like other top DNC officers, party rules require Dean to remain neutral until someone wins the nomination.

* Sen. Joe Biden of Delaware and Rep. Dennis Kucinich of Ohio; both made failed bids for this year's Democratic presidential nomination.

* Former President Jimmy Carter, who while officially uncommitted, has dropped hints that he supports Obama.

* U.S. House Democratic Caucus Chairman Rahm Emanuel, who served in the Clinton White House and, like Obama, is a member of the Illinois congressional delegation.

(Reporting by Thomas Ferraro; Editing by Eric Walsh)