The Media Fund is a 527 group, active in U.S. politics, which supported Democrat John Kerry's campaign for President.
According to the New York Times, the Media Fund raised $45 million to run issue ads in key swing states.
The Media Fund is one of several 527 groups which supported Kerry; others include America Coming Together and MoveOn.org.
After the election, the group experienced a dramatic drop in fundraising success; media reports speculated that major donors had given up on the organization, and were turning their attention to other, more long-term Democratic projects.
Groups including the Republican National Committee and Bush's reelection team had complained to the FEC about election law violations.